The General Motors 6L45 6-speed automatic transmission was produced in France from 2006 to 2015 and installed in many BMW models under its own designation, the GA6L45R. This automatic transmission, designated MYA, was also installed in the third-generation Cadillac ATS and CTS.
Specifications
| Type | automatic transmission |
| Number of gears | 6 |
| Type of drive | rear / all wheel |
| Engine volume, l | up to 3.6 |
| Torque output, Nm | up to 373 |
| Recommended oil | Dexron VI |
| Oil capacity, liter | 9.7 |
| Partial replacement, liter | 6.0 |
| Maintenance | every 60 000 km |
| Gearbox lifespan, km | ~250 000 km |
| Weight, kg | 78 |
Gear ratios GM 6L45
Using the 2014 Cadillac ATS with a 3.6-liter engine as an example:
| Main | 3.27 |
| 1st | 4.065 |
| 2nd | 2.371 |
| 3rd | 1.551 |
| 4th | 1.157 |
| 5th | 0.853 |
| 6th | 0.674 |
| Reverse | 3.200 |
Using
The transmission was installed on:
- Cadillac ATS I (A1SL) in 2012 – 2015;
- Cadillac CTS III (A1LL) in 2013 – 2015;
- BMW 1-Series E87 in 2007 – 2013;
- BMW 3-Series E90 in 2006 – 2013;
- BMW 5-Series E60 in 2006 – 2010;
- BMW X1-Series E84 in 2009 – 2015;
- BMW X3-Series E83 in 2006 – 2010;
- BMW Z4-Series E89 in 2009 – 2013.
Disadvantages of the GM 6L45 gearbox
- A known weak point of this automatic transmission is the torque converter and its hub;
- With an active owner, the torque converter clutches quickly wear out and clog the mechatronics;
- Then, due to a drop in pressure, the clutches in the transmission burn out and even the drums burst;
- The petal-type oil pump is very sensitive to long-term driving at high speeds;
- The control unit is sensitive to high temperatures and often fails when the automatic transmission overheats.
