Manual Transmission Description and Operation (MG9): Notes
WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
Manual transmissions are identified by the number of forward gears and the measured distance between the centerline of the output shaft and the counter gear.
The 6-speed manual transmission RPO: MG9 incorporates the following features:
- An aluminum case
- Fully synchronized gearing with an enhanced synchronizer cone arrangement:
- Triple-cone: FIRST, SECOND
- Double-cone: THIRD, FOURTH, FIFTH, SIXTH, REVERSE
- An internal shift rail mechanism
- A remote transmission shift control mounted forward of the transmission
- An external transmission shift rod enabling the rearward mount location of the transmission shift control
- Tapered roller bearings supporting the mainshaft and countershaft
- Caged roller bearings under all speed gears
- Solenoid inhibit of SECOND and THIRD gears
- Solenoid inhibit of REVERSE gear during predefined forward motion
These features combine to yield a rugged, reliable system capable of handling input torques of 766 N.m (565 lb ft).
The gear ratios are as follows:
| Gear | MG9 Ratio (:1) |
|---|---|
| FIRST | 2.66 |
| SECOND | 1.78 |
| THIRD | 1.30 |
| FOURTH | 1.00 |
| FIFTH | 0.80 |
| SIXTH | 0.63 |
| REVERSE | 2.90 |