The codes listed below come from the Vehicle Certification Label which is typically attached to the door latch edge on the driver side door.
| Code | Ratio |
| 15 | 3.31C |
| 16 | 3.73C |
| 17 | 3.31C |
| 19 | 3.55C |
| H5 | 3.31L |
| H6 | 3.73L |
| H7 | 3.31L |
| H9 | 3.55L |
| Code | Model |
| B | 4R75E |
| C | 6R75 |
| E | E4OD/4R100 |
| F | 6HP26 |
| G | 6HP26 |
| Q | 4R75E |
| U (1998-2003) | AOD |
| U (2004) | 4R70W |
| W | 4R75W |
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