The General Motors 4L70E (or M70) 4-speed automatic transmission was produced from 2005 to 2013 and was installed in rear-wheel drive/all-wheel drive models with powerful 5.3- and 6.0-liter V8 engines. This automatic transmission is familiar from the GMC Sierra, Chevrolet Silverado 1500, Trailblazer SS, and Saab 9-7X Aero.
Specifications
| Type | automatic transmission |
| Number of gears | 4 |
| Type of drive | rear / all wheel |
| Engine volume, l | up to 6.0 |
| Torque output, Nm | up to 565 |
| Recommended oil | ATF Dexron VI |
| Oil capacity, liter | 10.6 |
| Partial replacement, liter | 5.7 |
| Maintenance | every 80 000 km |
| Gearbox lifespan, km | ~400 000 km |
| Weight, kg | 83 |
Gear ratios GM 4L70E
Using the 2008 GMC Sierra with a 6.0-liter engine as an example:
| Main | 3.42 |
| 1st | 3.059 |
| 2nd | 1.625 |
| 3rd | 1.000 |
| 4th | 0.696 |
| Reverse | 2.294 |
Using
The transmission was installed on:
- Chevrolet Avalanche 2 (GMT941) in 2006 – 2008;
- Chevrolet Silverado 2 (GMT901) in 2006 – 2013;
- Chevrolet Suburban 10 (GMT931) in 2006 – 2008;
- Chevrolet Trailblazer 1 (GMT360) in 2005 – 2008;
- GMC Sierra 3 (GMT902) in 2006 – 2013;
- GMC Yukon XL 3 (GMT932) in 2006 – 2008;
- Saab 9-7X 1 (GMT360) in 2007 – 2008.
Disadvantages of the GM 4L70 gearbox
- This transmission is installed with powerful V8 engines, and the torque converter clutch wears out quickly;
- This dirt then clogs the solenoids, and the lubrication pressure in the system gradually drops;
- Then, the clutches in the 3-4 gear pack usually begin to slip and burn;
- At high mileage, the brake band and reverse drum are often replaced;
- Weak points of the transmission include the rubber-coated pistons and the petal-type oil pump.
