GM 4L80E Automatic Transmissions Overhaul Kits & Parts


4L80E Hydra-Matic Transmission (MT1) General Motors

Overhaul kits and parts.

We provide a large inventory selection for 4L80E automatic transmission overhaul kits, parts including 4l80_th_large.jpgsteels, kits, solenoids, filters, solenoids. This wide selection of parts are used in the GM 4L80E automatic transmission in GM C and K series pickups, Chevy vans including the express, Suburbans, School Bus, Motor Home, GMC Sierra and Savan's. In addition to these kit 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.


Free infomation is provided on parts illustrations, maintenance tips, overhaul tips and assistance in identifying just what automatic transmission you have in your vehicle. In addition a factory description and ratio information is available. 


Parts Illustration

Troubleshooting/Overhaul Manual
Maintenance Tips

Overhaul Tips
Remanufactured Automatic Transmission

What domest transmission do I have?
Considering overhauling your GM Chevrolet 4L80E transmission? The following list of parts are recommended by our remanufacture as being the parts that are most probably needed to put your 4L80-E back in top running order.
4 speed rear wheel drive, electronically controlled, automatic overdrive transmission with a torque converter clutch.
C/K Pickup School Bus
Chevy Van Motor Home
Chevy Express GMC Sierra
Suburban Savana
Towing Capacity:
12,000 lb (5442 kg) to 21,000 lb (9525 kg) Max Gross combined vehicle weight (application & axle ratio dependent)
Engine Range:

4..3L - 7.4L gasoline
6.5L Diesel
  Fluid Capacity: (approximate)Bottom Pan Removal: 4.0L - 6.0L
4.2qt - 6.3qt

Fluid Type:
Dexron® III

Fluid Recommendation

Install Aux Oil Cooler 


This is an abbreviated list and other parts are avialable. If you need something that is not listed just let us know.

Part Number




TM4L80E Troubleshooting/Overhaul Manual 1991-on


83-SGVT-22 Overhaul Manual on video tape  


MRK3300-S Master Rebuilder Kit (without steels) 1991-95


MRK3300E-S Master Rebuilder Kit (without steels)....High Energy 1996


MRK3300F-S Master Rebuilder Kit (without steels)....High Energy 1997-on


K3300-9 Steel Plate Sub-kit 1991-96


K3300F-9 Steel Plate Sub-kit.....Tubulator Design 1997-on


K33980 Bushing Assortment Kit 1991-96


K33980 Bushing Assortment Kit 1997-on


K34940 Thrust Washer Kit (without Selectives) 1991-on


K33941 Thrust Bearing Kit 1991-1996


33815 Overdrive Roller Clutch 1991-on


34418HD Intermediate Sprag Assembly 32 elements 1991-on


34402A Low Roller Clutch 1991-4/95


33813D Low Roller Clutch 5/95-on


K33889 Reverse Boost Bushing & Sleeve, prevents high line pressure in reverse & uncontrollable line rise. Prevents broken pistons, drums and cases 1991-on


K33887 TCC Regulator Valve Kit, reduces burned fluid, overheated converters, code 68, Improves TCC apply pressure 1991-on


K33900F-4 Piston Kit..... Molded Rubber 1997-on




The following components are available to enhance Shifting

Part Number




K33944A Jr Shift Kit TransGo, has a relief valve to prevent excessive line pressure 1991-on


ST33944 Shift Correction Package Superior 1991-on




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




33875 Input Shaft Speed Sensor 1991-on


33875 Output Shaft Speed Sensor 1991-on


K33869A Wiring harness with temperature sensor kit (updated/ clip on style) 1991-on


33877 Pressure Switch Manifold 1991-on


33871 A Shift Solenoid.........Latest Design 1991-on


33872 B Shift Solenoid.........Latest Design 1991-on


33870 PWM Lockup Solenoid. 1991-on


33879A Variable Force Motor...... Black Body - use with 33879A 1991-on


33883 Force Motor Retaining Clip.........use with 33879A 1991-on



Torque Converter ---------- Torque Converter Information

For this series transmission there are five different possibile torque converters. 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 sticker). The possibities are:

torqueconverter_large.jpg Torque Converter Installation/Preparation

Code Order Part Number   Application Price
152, 492, 494, 528, 576, 606, 670, 671, 675, 841 4L80-1   1991-up 454 Gas engine, 6.2L Diesel engine, low stall: single element stator $242.82
8676526, 8674193, 8682604, 8685-366 4L80-2   1991-up 5.7L 350 engine, high stall: dual element stator $2420.82
8685407, 8674198 4L80-3   1993-up 4.3L Truck, Van high stall, single element stator $247.95
0827, 0829 4L80-4L   2000-up 5.7L, 6.5L, 7.4L low stall, single element stator $293.87
364, 830, 0831, 0825 4L80-4H   2000-up 4.3L, 5.7L, 6.0L, high stall, single element stator $293.87
We supply only high quality remanufactured torque converters, cost + $50.00 core deposit


Miscellaneous Information and Specifications
Maximum Engine Torque: 440 lb (597 Nm) Maximum Gearbox Torque: 885 lb (1200 Nm) Maximum Speed Shift:

1-2 5200 rpm
2-3 5200 rpm
3-4 5200 rpm
Maximum Gross Vehicle Weight: 7200 lb (3265 kg) to 16,500lb (7483 kg) (application and axle ratio dependant) 7 Position Quadrant: P,R,N,OD,D,2,1 Control Systems:
Shift Pattern:
(2) two-way on/off solenoids
Shift Quality:
Force motor control
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 heavily-loaded vehicles. Superior stability allows high-temperature operation without varnishing valves and clutches.

Recommended for use after overhaul, mixing with existing fluid is not recommended!

redlineatf_large.jpg Red Line high-Temp ATF your cost $11.95 qt.  
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 $64.94 plus shipping and handling.


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 temperatuare up to 40 degrees F.
  • Extend fluid life
  • Eliminates transmission fluid foaming and oxidation
  • Reduces wear throughout the transmission
  • Elimates 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

Deep Transmission Pan


These high quality deep transmission pans can signifanctly improve the cooling of your 4l80E transmission. These pans are manufactured using heavy wall finned aircraft aluminu housings forgm4l60etranspanback.jpg additional cooling capability. They allow for an additional 4.5 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 attact metal particles (letting in know earyl 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 unique heavy duty larger transmission oil pans.
  • Furnished hardware; plugs, cap screws and washers are stainless steel in most applications, your cost $312.65 plus S&H.

Always consult and follow owners manual for maintenance intervals and requirements.

Overhaul Tips

Before you tear into the transmission, we suggest you first study the troubleshootin/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 transmisssion, 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 lub 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


Failue modes for torque converters manifest themselves in different ways, slow failue, i.e. loss of power over time, instant failure, i.e. input shaft spline failure. Following is a short list of problems, prossible causes:





Possible Cause


Lockup Surge Worn distributor shaft ATRA Bulletin #406
Lockup Shudder Inadequate oil to converter ATSG Bulletin #96-22
TCC Slipping (1994-95) PCM Software ATRA Bulletin #473



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 occured 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 surace. Grinding off on thread length from all lockup converter bolts is recommended to avert this type of failure.

 Parts Illustration:
 Click image to enlarge.
In addition to GM 4L80E automatic overhaul kits and repair parts we offer free technical support to assist you in solving your automotive problems.