The General Motors 4EL70 (MRD) hybrid automatic transmission was produced at the American plant from 2016 to 2018 and was installed exclusively in the Cadillac CT6 Plug-In Hybrid, paired with the 2.0-liter LTG turbo engine. This transmission is extremely rare, as this model was not widely produced.
Specifications
| Type | hybrid automatic transmission |
| Number of gears | ∞ |
| Type of drive | rear |
| Engine volume, l | up to 2.0 |
| Torque output, Nm | up to 585 |
| Recommended oil | ATF Dexron VI |
| Oil capacity, liter | 10.0 |
| Partial replacement, liter | 8.0 |
| Maintenance | every 80 000 km |
| Gearbox lifespan, km | ~300 000 km |
| Weight, kg | 150 |
Gear ratios GM 4EL70
Using the 2017 Cadillac CT6 Plug-In Hybrid with a 2.0 turbo engine as an example:
| Main | 3.27 |
| Range | n/a |
| Reverse | n/a |
Using
The transmission was installed on:
- Cadillac CT6 I (O1SL) in 2016 – 2018.
Disadvantages of the GM 4EL70 gearbox
- This is a very rare hybrid automatic transmission, and there is no information about its malfunctions anywhere;
- The owner’s main problem will be finding a service center that will repair the transmission;
- Due to the limited production run of the CT6 Plug-In Hybrid, it is difficult to find a donor car on the used market;
- Therefore, it is extremely important to regularly change the oil and monitor the cooling system;
- The problem of jerking when shifting can be eliminated by reprogramming the transmission.
