30 Problemas comunes 4L60E Transmisión y Reparación

30 Problemas comunes 4L60E Transmisión y Reparación | Charlotte NC Publicado por Beth Jackson el Lun, Mar 18, 2011 @ 07:21 AM Correo electrónico el artículo in Share 7 delicioso

0diggsdigg

¿Qué es una transmisión de 4L60E? La 4L60-E es una caja de cambios automática de cuatro velocidades overdrive, transmisión longitudinal colocado. Se ha considerado que la mejor versión de la transmisión de sobremarcha mejores jamás producidos. La 4L60-E se encuentra en casi todos los GM rueda trasera de la unidad de aplicación, incluyendo el camión C / K, Sonoma, Jimmy, Tahoe, Yukon, Astro, Safari, Suburban, Bravada, Firebird, Camaro y Corvette Antes de la tarde 4L60-E de transmisión, no era el 700R Turbo, que se introdujo en 1982. La 4L60-E es la continuación exitosa de GM en el cada vez mejor 700R4 (también conocido como "4L60" desde 1990), introducido en 1982. La 4L60-E es la "E" lectronically cambio de control de versiones de la 4L60. La tarde 4L60-E fue lanzado en 1997 y completamente implementado en un amplio uso a través de GM en 1998, tanto en plataformas de vehículos RWD (incluyendo el Corvette C6) y camiones en ambas configuraciones 2WD y 4WD. (La mayoría de los modelos de transmisión no son claramente señalado con la "E", ya que todas las transmisiones de GM son ahora también controlado electrónicamente). La transmisión de 4L60E ha pasó por muchos cambios / mejoras a lo largo de los años desde que salió por primera vez en 1982. De las campanas de cuerpos de válvulas, solenoides añadido, los cambios en la bomba y los convertidores. La transmisión de 4L60E pesa 146 libras seca y húmeda 162. Se requiere 8.4 cuartos (9.64 "convertidor de par) o 11,4 litros (11.81" del convertidor de par) de líquido de transmisión,

Top 30 problemas comunes de 4L60E Transmisión y Reparación A continuación se muestra una lista de problemas de transmisión común con la transmisión de GM 4L60E y las posibles soluciones para reparar. Aunque es posible que tenga algunos de estos síntomas / problemas con su transmisión de 4L60E, la solución de reparación pueden ser diferentes. Esta lista no es más que una guía de las posibles soluciones. Para un diagnóstico completo de su problema de transmisión GM 4L60E, en contacto con nosotros para un diagnóstico gratuito. 1. Slow, slipping or no reverse: “lo-reverse” clutches are worn out, fluid leak in the reverse apply circuit, or broken sunshell. It is possible to remedy a fluid problem by removing the checkball from its cage in the case in the rear of the transmission may help (must remove valve body), or adding a high-viscosity additive or other seal restorer product. También puede haber llevado la válvula de potencia (puede reemplazar en la sartén). 2. 1-2 shift does not happen at WOT (Wide Open Throttle) until you let off the gas: Best case: try replacing the TPS. Caso media: fuga en el circuito de 2 ª velocidad se aplican (montaje servo o acumulador 1-2). Double check by using the pressure gauge and watch for a big drop when the PCM commands 2nd gear. Peor de los casos: aumento de pobres presión de la línea (ver más abajo). 3 . 1-2 Shift shudder at WOT (Wide Open Throttle); delayed or abnormal 1-2 shift; There's a problem ONLY on the 1-2 shift: 1-2 accumulator piston cracked or stuck cocked in the bore. Compruebe la primavera de color amarillo en el interior del acumulador de la vivienda de la rotura. Además, si las paredes de viviendas acumulador se anotó, la vivienda debe ser reemplazado. 4. 1-2 shift is delayed and harsh, may not shift into OD: TPS needs to be checked for smooth and linear electrical response over the entire range of motion. If not, this must be replaced. 5. Trans does not upshift out of first, speedometer reads zero at all times: Could be VSS failure. Rear of transmission needs to be fixed. Transmission needs to come out in order to access VSS. 6. No 3rd or 4th gear: “3-4” clutches are worn out: Needs to be removed and rebuilt. El coche es seguro para conducir (en 2) hasta que te lo arreglen. 7. Sudden grinding noise with no prior warning primarily in 2nd gear, behavior in reverse may be abnormal: sunshell is fractured. Must be removed and rebuilt. Trate de no correr o conducir el coche o daños podría causar. 8. 1st and 3rd only, no 2,4 or R: Sunshell is fractured or splines are sheared off. Transmission must be removed and rebuilt. Trate de no correr o conducir el coche o daños podría causar. 9. No 2nd or 4th gear. 2-4 band is slipping: Servo seals may be damaged. Otherwise, 2-4 band is worn out. Transmission must be removed and rebuilt.

10. Trans shifts into gear harshly, car feels sluggish off the line, No 1st, 4th or TCC lockup available, Manual 2nd, 3rd and Reverse are only available gears, CEL is on: transmission is either in limp-home mode or has lost electrical power. Si hay un montón de códigos de error en el PCM, compruebe el fusible bajo el capó que los poderes de la transmisión, y si aparece de nuevo, buscar un cortocircuito en el circuito como un escape del arnés del sensor de O2 tocar. En caso contrario, comprobar los códigos de PCM para una falla en particular en la transmisión que provocan la PCM para ponerlo en el modo de movilidad mínima. 11. No 1st or 4th available; trans shifts 2nd to 3rd by itself in D or OD and locks the converter: ShiftA solenoid failed Or a wiring problem from PCM to trans or PCM. Needs diagnostic testing. 12. Car goes into gear but feels very sluggish like the brakes are dragging, but it will roll easily (starts out in 4th gear), you manually shift to 2 to get it moving, once it's moving you put it back in OD and the car shifts 3rd to 4th on its own and locks the converter at the appropriate time: ShiftB solenoid failed: A wiring problem from PCM to transmission or PCM. 13. No TCC (Torque Converter Clutch) lockup: Brake pedal switches improperly adjusted (always on), TCC solenoid failed, TCC clutch worn out (must remove transmission and replace TC). 14. TCC (Torque Converter Clutch) always locked: TCC apply solenoid circuit shorted to ground, TCC solenoid blockage, or TC broken (must remove trans and replace TC). 15. Horrible noise in 4th and feels like the brakes are on: overrun clutches are applying due to a cracked or leaking forward piston. Garras invadido se llevará a cabo después de 30 segundos de este comportamiento. Car can be safely driven in D. Transmission must be removed and rebuilt. 16. Soft shifting, gradual performance degradation: Poor line pressure rise due to leaking boost valve, clogged EPC filter screen, failing EPC solenoid, or worst case: leaky seals throughout. Seal restorer may fix last problem, but probably remove and rebuild needed. 17. No forward movement in OD or D, but L2, L1 and R work: Forward sprag is broken. Transmission must be removed and rebuilt. Trate de no correr o conducir el coche o daños podría causar. 18. Extremely harsh shifts from P or N, normal shifts at WOT: EPC (Electronic Pressure Control) solenoid failed. Fijar tan pronto como sea posible, las partes o con problemas finalmente se rompe. 19. Loud bang, grinding sound, loss of all gears, and a binding driveshaft: Snapped output shaft. Try to wiggle driveshaft - if more than 0.020" play, that's the sign. Must be removed and transmission rebuilt. 20. Trans seems noisy when moving in 1st and Reverse, noise goes away instantly

if you shift to N or the transmission goes into 3rd gear: Reaction planetary is worn out due to high miles or insufficient lubrication. Not a critical failure, but not a good sign either. Transmission must be removed and rebuilt, sooner rather than later. 21. No movement in any gear: pump failure, or total loss of fluid. Remove transmission and rebuild, or refill pan and find the leak. If out of fluid, avoid running the engine until the transmission is refilled to avoid pump damage. Para comprobar si hay fallo de la bomba, revise el nivel con el motor apagado y luego encender el motor y volver a comprobar el nivel del líquido. If level does not go down when engine is running, the pump is broken. 22. Transmission does not shift automatically, only manually. New PCM, check wiring, check other sensors such as VSS and TPS. 23. 3rd gear starts, can manually shift through all gears. When car has been turned off for a bit, then back on it will run normally.: VSS dropoff w/ Hi-stall converter. Las revoluciones son muy altas, pero VSS no muestra movimiento. Ocurre después de una quema de neumáticos despegue. No almacena un código, no a un tiro de CEL (he oído que va a almacenar un código si pasa tres o más veces). Cure: Reprogram PCM for VSS dropoff. 24. Fluid leak out of the front of trans where the converter connects; partial or full loss of movement : Front pump bushing walked out. Transmission must be removed and rebuilt. May have to replace converter also if hub is scored. Note that a leaking front seal usually means the bushing is walking out. 25. Torque converter shudder in 4th while lockup is engaged; problem goes away when the brake pedal is pressed slightly to unlock converter: Need to verify line pressure, and provided no valves in the TCC (Torque Converter Clutch) hydraulic circuit are worn, replace the torque converter. 26. Shift suddenly become very hard. When going from park to either reverse or drive it slams into gear. 1-2 and 2-3 shifts are also harsh. All gears seems to work. Problem may be intermittent: Check TPS for smooth electrical response. If the response is jumpy or erratic at all, replace TPS ( Throttle position sensor) . 27. All fluid pumped out through the vent tube: Plugged cooler line. Enjuague las líneas de transmisión más frío y más frío. También podría ser overfiled transmisión. 28. Car acts like it's in OD in neutral, car is locked stationary in R, engine feels loaded in P, all four forward positions work fine: Transmission must be removed and rebuilt. Internal crossleak feeding the forward clutches all the time. Lo más probable es una caja de entrada roto o agrietado adelante pistón hacia adelante significa garras están fusionados. Coche con seguridad se puede conducir con suavidad en las marchas adelante hasta que la reparación. 29. Needle bearings in the pan, first gear and/or reverse may be noisy: Either a torrington bearing or a planetary bearing is on its way out. Transmisión eventualmente morir fuerte, catastrófico. Cheaper to rebuild now (saves further damage to hard parts), but requires removal and rebuild. It is drivable until it breaks.

30. 1-2 or 2-3 shift is slow/soft above part throttle: Transmission is on its way out. Transmission must be removed and rebuilt. Twin Automotive & Transmission, Charlotte's Transmission Specialist, provides free transmission repair diagnostics (diagnostic is free with repair of the transmission). Twin Automotive offers Charlotte NC 's Longest Transmission Rebuild Warranty - 3 Years / Unlimited Miles. The above top 30 common problems with the 4L60E Transmission and possible solutions for repair are merely a guide. Although you may have a similar problem as those listed above, the repair may differ based upon a visual inspection of the vehicle. Transmission problems only worsen with time. If you have any problems with your GM 4L60E Transmission, please contact us at 704-821-3460 to speak with a Charlotte transmission repair specialist.

GM 4L60E Automatic Transmission Overhaul Kit & Parts

General Motors 4L60E Hydra-Matic Transmission electronic (M30 or M32)

Free informatiion is provided to assist you in trouble shooting your 4L60E problems. Data on transmission specification is provided

along with maintenance data. Inaddition we provide a large inventory selection for 4L60E electronic controlled automatic transmission overhaul kits, parts including steels, kits, solenoids, filters, solenoids. This wide selection of parts are used in the GM 4L60E automatic transmission in GM Chevy Camaro, Corvette, S10 pickup trucks and blazers, Tahoe, Astro Van, Suburban, Pontiac Firebird, in C and K Series Pickups, GMC Sonoma, Jimmy, Yukon Safari and Oldsmobile Bravada. In addition to these master overhaul kits we also supply torque converters, fluids, problem prevention kits and in most cases we can supply good take out hard parts and save you some money!

The follwoing free information is provided: Common Failure Problems

Remanufactured Automatic Transmission What domestic transmission do I have?

Parts Illustration

Trouble Codes How to get Trouble Codes

Maintenance Tips Fluid Additive Troubleshooting/Overhaul Overhaul Tips Manual

Clearing Trouble Codes In addition a factory description and ratio information is available.

Description:

Ratios:

4 speed rear wheel drive, electronically controlled, automatic overdrive transmission with a torque converter clutch.

1st: 3.059 2nd: 1.625 3rd: 1.000 4th: 0.696 Rev: 2.294

Chevy Camaro

Pontiac Firebird

Chevy Corvette

C/K Pickup

S Truck

GMC Sonoma

Early version

Tahoe

4L60 non GMC Jimmy electronic & 700R4 GMC Yukon

Astro

GMC Safari

Suburban

Oldsmobile Bravada

S Blazer

Fluid Capacity:(approximate)Fluid Type: Dexron® III Dry: 7.9L (8.4qt) with 245mm converter 10.8L (11.4qt) with Fluid Recommendation 300mm converter

Engine Range: 2.2L - 5.7L

Considering overhauling your Chevrolet 4L60E transmission? The following list of parts are recommended by our remanufacture as being the parts that are most probably needed to put your 4L60-E back in top running order. This is an abbreviated list and other parts are available. If you need something that is not listed just give us a call toll free 800-216-1632. Part Number TM4L60E

Qty Req

Description

Years Price

Troubleshooting/Overhaul Manual

1993- $48.97

on Troubleshooting/Overhaul Manual Supplement

TM4L60E

1993$48.97 on

MRK5100E-S

1

Master Rebuild Kit (no steels) notes 2,3 1993$162.88 &4 1997

MRK5100ET-S

1

Master Rebuild Kit (no steels) notes 1, 1993$219.81 2,3 & 4 1997

MRK5100K-S

1

Master Rebuild Kit (no steels) notes 2,3 1998$188.99 &4 on

MRK5100KT-S

1

Master Rebuild Kit notes 1, 2,3 & 4

1998$225.55 on

K5100E-9

1

Steel kit 4L60E

1993$61.76 96

K5100J-9

1

Steel kit 4L60E with Turbulator Steels

1997$95.97 on

K51980

1

Bushing Kit

1993$21.99 on

K51940

1

Thrust Washer kit (with Selective's)

1993$14.82 on

K51941

1

Thrust Needle Bearing Kit

1993$39.55 on

51814A

1

Forward Clutch Sprag Assembly always 1993replace if over 60,000 miles constant $73.77 on under load

51815

1

Low & Reverse Roller Clutch -HD

1993$25.93 on

K51900J-4

1

Molded Rubber Piston Kit

1997$45.81 on

B&B-4L60VB

1

Valve Body Factory remanufactured

Notes:

1) Kit includes High Energy Band, Thin 3-4 ZHigh energy Frictions, Steels and Pressure Plate. 2) includes filter for shallow pan. 3) 1993-96 units

$426.51

utilize a molded rubber 3-4 piston order 51843E. 1997-on order pistons K61900J-4. 4) 1997-on Corvettes require a unique extension housing seal order 51551JC. Increase fluid capacity, reduce operating temperatures, extend transmission life, convenient drain plug, increase transmission rigidity.

Deep Transmission Pan

NAPK51884

Add 3 extra Kit includes filter, gasket, bolts and pickup quarts of extension. fluid!

Easy installation no modifications necessary.

$232.91

External Cooler Auxiliary Long "True Cool" Lower pressure Drop Cooler 8" x 11" x 1.5" Complete kit. Remove the heat extend the transmissions life.

LPD4589

$118.75

The following components are available to enhance Shifting Part Number

Qty Req

Description

K51944E

1

Valve Body Shift Kit

Years Price $78.96

The following electronic components may or may not be required. The best way to determine this is by check/consulting computer code(s) or electronic scanner results. Part Number

Description

Years Price

51870U

TCC Solenoid (Universal Type - Rostra)

1993 $30.97

51870T

TCC Solenoid (Universal Type - teckpak)

1993 $30.97

K51870EC

Lock-up Solenoid with Internal Wiring Harness and Pressure Switch Manifold

1993$194.67 on

51871

A&B Shift Solenoid

1993- $34.91

on 51873

3-2 PWM Solenoid

1993$38.85 1995

51873A

3-2 On-Off Solenoid

1996$36.93 on

51873

TCC (PWM) Solenoid

1995$38.85 on

51879

Force Motor (EPC) Solenoid Operates at 292.5 Hz

1993 $105.96

33879A

Force Motor (EPC) Solenoid Operates at 614 1994$90.16 Hz on

Torque Converter ---------- Torque Converter Problem & Information For this series transmission there are MANY different possible torque converters (not all listed here). When rebuilding your transmission it is always recommended that you change the torque converter. When ordering the torque converter you must supply the four digit code off of the existing unit (located on a sticker). Some of the possibilities are:

Code

Order Part Application Number

Price

1996L-98; 3.8L Cameron, Firebird, Low Stall; Strategy 1 Solid Carbon Clutch $201.73 Torque Converter Lining Installation/Preparation 1998-up; ECCC Lockup Strategy Low stall Strategy 2, Woven Carbon Clutch $201.73 Lining

E, L, J

C33B

E, L, J

C33C

B, Z

C35B

1996L-1998 2.2Lt. S10 High Stall; $201.73 Strategy1; Solid Carbon Clutch Lining

B, Z

C35C

1996L-1998 ECCC Lockup Strategy High$201.73 stall Strategy 2, Woven Carbon Clutch

Lining G, F, H, K

B, E

C40B

1995-98 4.4L, 5.0L, 5.7L Strategy 1; Solid Carbon Lining

C48B

1995-98 High Stall; 3.4L, 3.8L,4.3L, 5.0L Be sure to use our turbo, Strategy 1 Solid Carbon Clutch $209.91transmission cooling Lining line flush in order to

$209.91

remove debris. Your 1995-98 High Stall; Corvette, 4.3L DCLF, DBAF C48BHP Blazer, Jimmy; Strategy1; Solid Carbon $286.60cost is $11.88 order Kooler Kleen. Clutch Lining; High Stall Stator PWM Strategy 1 vs. Strategy 2 Strategy 1 = Lockup becomes active after 4th gear: Solid Carbon Clutch Lining Strategy 2= Lockup becomes active in 2nd gear with controlled slippage: Woven Carbon Lining. PWM = Pulse width modulator We supply only high quality remanufactured torque converters, cost + $50.00 core deposi

Miscellaneous Information and Specifications Maximum Engine Torque: 350 lb (474 Nm)

Maximum Speed Shift: Maximum Gearbox Torque: 1-2 6000 rpm 2-3 6000 rpm 670 lb (910 Nm) 3-4 6000 rpm Control Systems:

Maximum Gross Vehicle Weight: 8600 lb (3900 kg)

7 Position Quadrant: P,R,N,OD,D,2,1 P,R,N,OD,3,2,1

Shift Pattern: (2) two-way on/off solenoids Shift Quality: Variable Bleed solenoid Torque Converter Clutch: Pulse with modulated solenoid control

Troubleshooting/Overhaul Manual These manuals are typically 50 to 85 pages and contain both troubleshooting information and data to support overhaul, such as electronic data, illustrations and specific procedures and specifications. These are professional shop manuals which will give you the capability to diagnose problems, and evaluate repair options. If you decide to have your transmission overhauled at a local shop you will be armed with detailed knowledge of problems and potential fixes. This information should allow you to get the best deal, Always compare pricing for labor. If you supply the parts and ask for warranty in the end you will save money.

Fluid Recommendation: Red Line high-Temp ATF Our Red Line high-Temp ATF --is a synthetic GL-4 gear oil for use where Dexron III is recommended. A higher viscosity allows optimal operation at 70 degrees higher temperature, providing better torque converter efficiency. Perfect for heavilyloaded vehicles. Superior stability allows hightemperature operation without varnishing valves and clutches.

Red Line highTemp ATF your cost $11.95 qt.

Recommended for use after overhaul, mixing with existing fluid is not recommended! Our LubeGard "automatic transmission protectant " is recommended as an additive to improve transmission life and maintenance. Master Rebuild Kit Typically contains gaskets and rubber kit, sealing rings, metal/rubber clad seals, friction plates, steel plates* , front and rear bushings, filter and where applicable Band* and/or Modulator*. *not included if listed separately Maintenance Tips Regular maintenance cycles and continued checking of fluid levels is critical to the life of your transmission. Operating temperature is the single most critical parameter effecting the life of the transmission. Keep the temperature down and fluid fresh helps the units typically last a very long time under normal driving conditions (no teenagers involved). We can supply a couple of aftermarket products to help you get the most out of your transmission: Auxiliary Transmission Oil Cooler. The Truco part number LPD4451 is an excellent auxiliary oil cooler to provide additional cooling capacity. The kit includes all parts required to mount the unit and connect to existing cooling lines. This is a typical do it yourself project. The unit typically mounts in front of the radiator. Your cost on this transmission life saving product is $54.94 plus shipping and handling. Deep Transmission Pan These high quality deep transmission pans can improve the cooling of your 4l80E transmission.

These pans are manufactured using heavy wall finned aircraft aluminum housings for

additional cooling capability. They allow for an additional 3 1/3 quarts of fluid. The transmissions are easier to check and service these advance pans and offer the following features: O' Ring seal, snapped into a inverted "V" groove for a positive seal without gasket or silicon (except TorqueFlite). Magnetic drain plug to attract metal particles (letting in know early about potential problems). 1/8 NPT temperature sending port, you can now monitor the transmission temperature if

desired. Unit ships with plug. We also offer transmission pans .

unique larger automatic

Furnished hardware; plugs, cap screws and washers are stainless steel in most applications, your cost $266.36 plus S&H. Fluid Additive Generally we don't recommend additives but we have found that the Lubegard "Automatic Transmission Protectant" at only $13.93 + S&H can: Prevent overheating, reducing transmission temperature up to 40 degrees F. Extend fluid life Eliminates transmission fluid foaming and oxidation Reduces wear throughout the transmission Eliminates clutch chatter and torque converter shudder Softens and modifies harsh shifts Provides for smoother shifting Eliminates objectionable noises during shifts Keeps valves and governors free and frees stuck valves in valve bodies Raises the thermal and oxidative stability Only product that increases the fluids ability to transfer heat

Contains no Ash Always consult and follow owners manual for maintenance intervals and requirements. Consult and follow owners manual for maintenance intervals and requirements. Overhaul Tips Before you tear into the transmission, we suggest you first study the troubleshooting/overhaul manual, add a bottle of our "Automatic Transmission Protectant" and put a few miles on the vehicle. This just might free valves and governors that are possible stuck in valve bodies. Be sure to get computer trouble code(s), see owners manual for technique to acquire malfunction codes. This will be a great assistance in diagnosing possible problems. Twenty-One Steps to Successful Transmission Repair: 1) Do your research locate any technical bulletins pertaining to your transmission, ask your dealers parts department for bulletins. 2) Clean the entire transmission, including the valve body. 3) Check pump, valve body and case for warpage. 4) Flat file pumps, valve bodies, and cases. Just a few strokes with the file to knock off high spots and handling burrs. 5) Check all pump gear clearances. 6) Check planet pinion end play and side to side motion. 7) Soak all planet assemblies. 8) Soak all friction materials for 15 - 30 minutes. 9) Make sure all steels are in usable condition or replace. Do not sand or tumble steels when used against High Energy friction materials. 10) Inspect all surfaces upon which a band will ride. 11) Replace all rotating oil control rings. 12) Check all oil control rings and rubber products in the bores for proper fit. 13) Check all major support bushings and bushings that control lube oil. 14) Pre-lubricate all bushings and thrust washers. 15) Pre-lub pumps. 16) Pre-fill torque converter. 17) Use available manuals to ensure proper specifications and clearances.

18) Set correct clutch and band clearances. 19) Take the time to set the total end play. 20) Use a torque wrench on all pumps and valve bodies. 21) Always double flush the cooling and cooling return lines to the radiator to remove particles trapped there. Take your time, take your time, take you time! Torque Converter Information Failure modes for torque converters manifest themselves in different ways, slow failure, i.e. loss of power over time, instant failure, i.e. input shaft spline failure. Following is a short list of problems, possible causes: Complaint

Possible Cause

Reference/Fix

Overheated Converter

TCC/PWM Solenoid ATSG Bulletin #98-25 filled with debris

Overheated Converter

Transgo #SK4L60E or Sonnax #77754-03k Replace worn TCC (92-97), 77754-04k Regulator Valve (98-up) these require reamer #77754-R2

LOCKUP Slipping Worn valve body (CODE P1870) casting

ATSG Bulletin #00-41

TCC Slipping (1994-1995)

ATRA Bulletin #473

PCM Software

The difference between stator design, look inside the converter at the larges set of splines (stator shaft splines). If the splines are split then the unit has a dual element stator. Do not interchange single element and dual element converters. Torque Converter Installation/Preparation Many torque converter problems can be avoided with proper preparation: 1) Pre-thread converter bolts by hand to make sure there is no sign of stripped threads. 2) Check and clean crankshaft thoroughly. Change crank spacer (if applicable). 3) Use 320 grit sandpaper or Emory cloth to remove any metal shavings on crankshaft. 4) Check converter for any damage that may have occurred during shipping. 5) Pre-fill converter with a minimum of (1) quart of transmission fluid.

6) Clean all paint off the pilot using 320 grit emory cloth. 7) Apply grease, not transmission gel, on the pilot. 8) Check flexplate for cracks and be sure there is no more than .006" run out. 9) Make sure all engine dowel pins are in place and clean. 10) Make sure all electrical ground straps are properly connected. 11) Never, Never use an impact gun to install torque converter bolts. Driving a bolt into the converter cover will create a dimple on the lockup apply surface. Lockup clutch failure will occur when the lockup piston applies against and uneven surface. Grinding off on thread length from all lockup converter bolts is recommended to avert this type of failure.

Parts Illustration Click to see enlarged illustration In addition to Chevrolet & GMC automatic overhaul kits and repair parts we offer free technical support to assist you in solving your automotive problems.

Common failures on 4L60E, problems any possible repair Problem

Symptoms

Possible repair

“lo-reverse” clutches are worn out, fluid leak in the reverse apply circuit, or broken sunshell.. May also have worn boost valve.

It is possible to remedy a fluid problem by removing the checkball from its cage in the case in the rear of the Transmission may help (must remove valvebody), or adding a high-viscosity additive such as Lucas Transmissionmission additive or other seal restorer product.

Middle case leak in the 2nd gear apply circuit (servo assembly or 1-2 accumulator). Doublecheck by using the pressure gauge and watch for a big drop when the PCM commands 2nd gear. Worst case poor line pressure rise (see below).

Try replacing the ThrottlePosition Sensor ThrottlePosition Sensor (TPS).

1-2 Shift shudder at WOT delayed or abnormal 1-2 shift There's a problem only on the 1-2 shift

1-2 accumulator piston cracked or stuck cocked in the bore.

Check the yellow spring inside the accum housing for breakage. Also, if the accumulator housing walls are scored, the housing must be replaced. Easy fix in the pan.

1-2 shift is delayed and harsh, may not shift into Over Drive

CheckThrottlePosition Sensor (TPS).for smooth and linear electrical response over the entire range of motion.

If not, replace.

Slow, slipping or no reverse

1-2 shift does not happen at WOT until you let off the gas

Transmission does not upshift out of first, speedometer reads Cross member must come zero at all times Speed Sensor out to access Speed Sensor (VSS) failure. (VSS).

Easy fix on rear of Transmissionmission,

Will not work in 3rd or 4th gear

“3-4” clutches are worn out. The car is safe to drive (in 2nd) until you can get it fixed.

Remove & replace or rebuild

Sudden grinding noise with no prior warning primarily in 2nd gear, behavior in reverse may be abnormal

sunshell is fractured. Try not to run or drive the car or further damage could result.

Remove & replace or rebuild

1st and 3rd only, will not work in 2nd ,4th or Reverse

sunshell is fractured or splines are sheared off. Try not to run or drive the car or further damage could result.

R&R

Will not work in 2nd or 4th gear

2-4 band is slipping. Servo seals may be damaged (can be fixed without removing Transmission. Otherwise, 2-4 band is worn out.

Remove & replace or rebuild

Transmissionmision is either in limp-home mode or has lost electrical power. If there are lots of error codes in the PCM, Shifts into gear harshly, car check the underhood fuse feels sluggish off the line, No that powers the 1st, 4th or Torque Converter Transmissionmission, and if Control (TCC) lockup available, it pops again, look for a Manual 2nd, 3rd and Reverse short in that circuit like an are only available gears, CEL is O2 sensor harness on touching exhaust. Otherwise, check PCM codes for a particular fault in the Transmissionmission causing the PCM to put it in limp-home mode.

Will not work in 1st or 4th available Transmission shifts

ShiftA solenoid failed. Or a wiring problem from PCM

check the underhood fuse that powers the Transmissionmission

Easy fix in the pan.

2nd to 3rd by itself in Drive or Over Drive and locks the converter

to Transmission.. or PCM.

Transmissionmission goes into gear but feels very sluggish like the brakes are on, but it will roll easily (starts out in 4th gear), you manually shift to 2 Shift B solenoid failed. Or a to get it moving, once it's wiring problem from PCM moving you put it back in OD to Transmission.. or PCM. and the car shifts 3rd to 4th on its own and locks the converter at the appropriate time

No Torque Converter Control (TCC) lockup

Brake pedal switches improperly adjusted (always on), Torque Converter Control (TCC) solenoid failed (easy fix in the pan), Torque Converter Control (TCC) clutch worn out

Easy fix in the pan

(must remove Transmission and replace TC).

Torque Converter Control (TCC) always locked

Torque Converter Control (TCC) apply solenoid circuit shorted to ground, Torque Converter Control (TCC) solenoid blockage.

Easy fix by removing the pan. or Torque Converter is damaged (must remove Transmission and replace TC).

Loud noise in 4th gear and feels like the brakes are on

overrun clutches are applying due to a cracked or leaking forward piston. Overrun clutches will be worn out after 30 seconds of this behavior. Car can be safely driven in D.

Remove & replace or rebuild

Soft shifting, gradual performance degradation

Poor line pressure rise due to leaking boost valve, clogged Electronic Pressure Control (EPC filter screen,

Also try a Transmissionmission flush with BG brand products if problem continues,

failing Electronic Pressure Control (EPC solenoid, or worst case leaky seals throughout. Transgo HD2-C kit fixes first two without removing Transmission. Seal restorer may fix last problem.

No forward movement in OD or D, but L2, L1 and R work

Extremely harsh shifts from P or N, normal shifts at WOT

Loud bang, grinding sound, loss of all gears, and a binding driveshaft

Transmission seems noisy when moving in 1st and Reverse, noise goes away instantly if you shift to N or the Transmission goes into 3rd gear

Forward sprag is broken.

Electronic Pressure Control (EPC (Electronic Pressure Control) solenoid failed.

probably R&R

Remove & replace or rebuild Try not to run or drive the car or further damage could result. Easy fix in pan. Fix as soon as possible or hard parts will eventually break.

snapped output shaft. Try to wiggle driveshaft - if more than 0.020" play, that's the sign.

Remove & replace or rebuild

Reaction planetary is worn out due to high miles or insufficient lubrication. Not a critical failure, but not a good sign either.

Remove & replace or rebuild sooner rather than later.

No movement in any gear

pump failure, or total loss of fluid. If out of fluid, avoid running the engine until the Transmission is refilled to avoid pump damage. To check for pump failure, check fluid level with the engine off, then start the engine and recheck fluid level. If level does not go down when engine is running, the pump is broken.

Remove & replace or rebuild, or refill pan and find the leak.

Transmissionmission does not shift automatically, only manually.

Check wiring, check other sensors such as Speed Sensor (VSS) andThrottlePosition Sensor (TPS)..

Swap in a known-good PCM,

Speed Sensor (VSS) dropoff w/ Hi-stall converter. The rpms are too high, but Speed Sensor (VSS) is showing no movement. Happens after a tire burning take-off. Doesn't store a code, will not throw a CEL.

Reprogram PCM for Speed Sensor (VSS) dropoff

Front pump bushing walked out.May have to replace converter also if hub is scored. Note that a leaking front seal usually means the bushing is walking out

Remove & replace or rebuild

problem goes away when the brake pedal is pressed slightly to unlock converter. Have a shop verify line pressure, and provided no valves in the Torque Converter Control

Lubegard Shudder Fix will at least fix this for awhile. Or try a Transmissionmission flush by a shop that uses BG brand products.

3rd gear starts, can manually shift through all gears. When car has been turned off for a bit, then back on it will run normally.

Fluid leak out of the front of Transmission where the converter connects partial or full loss of movement

Torque converter shudder in 4th while lockup is engaged

(TCC) hydraulic circuit are worn, replace the torque converter.

Shifting suddenly become very hard. When going from park to either reverse or drive it slams into gear. 1-2 and 2-3 shifts are also harsh. All gears seems to work. May be intermittent

Fluid pumped out through the vent tube

CheckThrottlePosition Sensor (TPS).for smooth electrical response. If the response is jumpy or erratic at all.

replaceThrottlePosition Sensor (TPS)..

Plugged cooler line.

Flush the Transmissionmission cooler and cooler lines. Also could be overfiled Transmissionmission.

Internal crossleak feeding the forward clutches all the Transmissionmission acts like time. Most likely a cracked it's in Over Drive in neutral, car input housing, or cracked is locked stationary in Reverse, forward piston means engine feels loaded in ark,, all forward clutches are fused four forward positions work together. Car can safely be fine driven gently in forward gears until the repair.

Remove & replace or rebuild

Needle bearings in the pan, first gear and/or reverse may be noisy

Either a torrington bearing or a planetary bearing is on its way out. Transmission will eventually die a loud, catastrophic death. Cheaper to rebuild now (saves further damage to hard parts). It is drivable until it breaks.

Remove & replace or rebuild

1-2 or 2-3 shift is slow/soft above part throttle

Transmissionmission is failing.

Remove & replace or rebuild

Before guessing at Transmissionmission problems, check the fluid level (car warmed up, engine running in Park on level ground) and have the PCM scanned for trouble codes FIRST. This guide is meant for problems that do not show up as PCM codes (like shift A&B solenoid failures, for example).

NOTE The Transmissionmission is on the same fuse as the MAF, O2 sensors and at least one other sensor - if an O2 shorts out, it will blow the fuse and the Transmission will go into limphome mode. Be sure the Transmission has power and the fuse is not blown before doing anything else. Also note that many problems that show up as Transmissionmission issues are actually PCM or electrical, and may be external to the Transmissionmission. Try a different PCM, and check for chafing where the cables come out of the PCM. Secondly, put a line pressure gauge ($55 shipped on Ebay, or visit a local Transmission shop) on the pressure test port and go for a drive to verify proper line pressure. Base pressure at idle in P,N,OD should be around 70psi and around 140psi in R. Max line pressure should be at least 190psi at WOT in 1st or 2nd, 225psi is optimum. If base pressure is low, Transmission or pump is worn out. If max pressure is low, check Electronic Pressure Control (EPC solenoid. If reverse is slow to engage, and line pressure does not come up to at least 130psi in reverse, replace the boost valve with a Transgo 0.500" boost valve Easy fix by removing the pan. Beware of coolant contamination - coolant will cause clutch packs to delaminate and thus cost you a rebuild! Transmission fluid eats radiator hoses! If you find any sign of cross contamination, fix the problem and thoroughly flush both systems IMMEDIATELY. What is "limp-home mode" ? This is a fault mode in which the Transmissionmission either loses electrical power or the PCM deactivates all of the electronics. The Transmissionmission will default to max line pressure. The driver will have Reverse and 3rd, with manual 2nd available by putting the gearshift in 2 or 1 (doesn't matter). 1st, 4th, and Torque Converter Control (TCC) lockup will not be available. It will not hurt the car to drive it like this for short periods, but use manual 2nd to get the car moving, and be aware that the Transmission will generate more heat than normal while operating in limp-home mode due to increased torque converter slippage during 2nd gear starts and no lockup in 3rd gear. Generic GM Automatic Transmission Codes Without Onboard Diagnostics (OBD-II) Code

Problem

Code

Problem

21

TPS circuit

66

3-2 Control solenoid circuit fault

22

TPS out of adjustment

67

Torque Converter Control (TCC) solenoid circuit

28

Transmissionmission range pressure switch

69

Torque Converter Control (TCC) stuck on

31

park/neutral switch

72

Speed Sensor (VSS) circuit loss

Transmissionmission output signal 36

Transmissionaxle shift control (3.8L)

73

Transmission pressure control solenoid

37

brake switch(4L60-E Transmission)

79

Transmissionmission fluid temp high

39

Torque Converter Control (TCC) knock sensor shorted(4.3L)

81

Transmissionmission 2-3 error

58

Transmission code-TTS temp high

82

Transmissionmission 1-2 error

59

Transmission code-TTS temp low

83

Torque Converter Control (TCC) solenoid circuit fault

How to get Trouble Codes Turn ignition switch to OFF position Locate Data Link Connector (DLC), see image below. Jumper the A&B terminals(a paper clip or a jumper wire work ok) Turn Ignition switch to ON position. Count the flashes on the "CHECK ENGINE" or "SERVICE ENGINE" light. FLASH, pause, FLASH, FLASH = code 12 NOTE: Some 94 & 95 models do not have the B terminal. In which case a scanner is required. NOTE: Some 94 & 95 models that DO have the A & B terminals still require a scanner. All vehicles after 96 are OBDII,and require a scanner to access them. 12 Pin Data Link Cconnector (under dash)

A - Ground

F - Torque Converter Control (TCC)

B - Test Terminal

G - Fuel Pump

C - Air Injection

H - Brake Sense Speed Input

E - Serial Data

M - Serial Data

Clearing Trouble Codes Diagnostic trouble codes may be cleared by disconnecting the battery ground cable for at least

20 seconds. Reconnect negative battery cable and recheck codes to confirm the repair.

We offer a complete line of automatic transmissions, transmission overhaul kit and accessories for your vehicle, check out the following links:

Remanufactured Transmissions Overhaul Kits for other Auto Transmission

Performance & Problem Solving Kits for Automatics

Last Updated ( Tuesday, 26 April 2011 )

To order complete our secure electronic EZorder form. Or call the order desk at 1-800-2161632 or 1-877-572-7876. Free technical support is available call 702-810-3100 ext 106 or 101, talk to a Drivetrain expert get answers to repair or upgrade questions, also help in automotive diagnostic problems. Like to ask a question before you place your order, its easy just email us.