4L80E Sprag Transmission parts, repair guidelines, problems, manuals
Transmission general data
| Number of gears | Transmission Type | Drive | Torque (Nm) | ATF (full capacity) L | ATF (change) L | ATF type |
|---|---|---|---|---|---|---|
| 4 | AT | RWD/4WD | 600 | 13,4 | 6,7 | Dexron VI |
What are you looking for?
Overhaul Kit | Friction Kit | Friction | Steel Plate | Steel Kit | Band | Solenoid Kit | Solenoid EPC | Solenoid TCC | Pump | Shaft | Drum | Valve body | Torque converter | Hub | Piston | Piston Kit | Planetary Gear | Filter | Gasket | Bushing | Seal | Bearing | Pressure Plate | Stator | Differential | Retainer | Inhibitor Switch | Instruction manual | TOOLS & ACCESORIES | Sensor
Technical issues and repair guidelines
This transmission is a rare “guest” in repair services, thus it can be assumed that this unit is quite reliable. It went through many upgrades without serious changes (only rarely updating gaskets, seals, and filters). Clutch and brake packages are designed very reliably with such a huge reserve, that the type of friction elements hasn’t been changed since 1965.
The Direct clutch pack is the first to be worn-out and considered to be one of the weakest clutch packs. But it is quite normal and occurs after considerable mileages, extreme operating conditions and loads. If friction components of two abovementioned packs burn ATF for a long time and this ATF soaks in other friction linings, then the whole set of friction components should be replaced.
After 12-15 years of usage the wear-out of bushings becomes clear and vibrations exceed allowed limit, therefore repair specialists have to replace the whole set of bushings. Solenoids and the torque converter lock-up solenoid also reach the end of their service life by time. Almost all overhauls are performed when bushings, hollow discs, solenoids reach the end of their long service life. These transmissions easily operate for 200 thousand kilometers and even longer.
Instruction manuals and useful links Suggest your link
| Link type | Source | Description |
|---|---|---|
| www.at-manuals.com | Scheme 4L80 | |
| drive.google.com | Repair manual 4L80E ATSG | |
| drive.google.com | Repair manual GM Powertrain 4l80e | |
| drive.google.com | All necessary information 4L80e | |
| Sonnax | Vacuum test 4L80-E, 4L85-E | |
| www | Sonnax | Outsmarting 4L80-E Overdrive Roller Clutch Failure |
| www | Sonnax | Check Balls 4L80 |