1988 - 4T60
| Model Code | Engine | Platform | Differential Ratio | Sprocket Ratio | Final Drive Ratio | Converter Code | Convertor Stall Speed |
| AAH | Cadillac 4.1 V8 | C-Body | 3.33 | 37/33 | 2.97 | FM8C | 1525 |
| ABH | Cadillac 4.1 V8 | E/K-Bodies | 3.33 | 37/33 | 2.97 | FM8C | 1525 |
| AFH | Cadillac 4.1 V8 | Limo | 3.33 | 37/33 | 2.97 | FM8C | 1525 |
| ANH | Cadillac 4.5 V8 | C-Body (Export) | 3.33 | 37/33 | 2.97 | FM8C | 1525 |
| ATH | Cadillac 4.5 V8 | E/K-Body (Export) | 3.33 | 37/33 | 2.97 | FM8C | 1525 |
| BJH | Buick 3800 V6 | H-Body | 3.33 | 37/33 | 2.97 | FL4B | 1895 |
| BKH | Buick 3800 V6 | C-Body | 3.06 | 37/33 | 2.73 | FY4B | 1895 |
| BRH | Buick 3800 V6 | E-Body | 3.33 | 37/33 | 2.97 | FL4B | 1895 |
| BTH | Buick 3800 V6 | C-Body | 3.33 | 37/33 | 2.97 | FL4B | 1895 |
| BYH | Buick 3800 V6 | E-Body | 2.84 | 35/35 | 2.84 | FL4B | 1895 |
| CFH, CMH, CRH, CWH, CXH | 2.8 V6 | A-Body | 3.33 | 35/35 | 3.33 | FD6B | 2095 |
| CTH | 2.8 V6 | W-Body | 3.33 | 35/35 | 3.33 | FD6B | 2095 |
| FBH | Buick 3800 V6 | H-Body | 3.06 | 37/33 | 2.73 | FY4B | 1895 |
| FCH | Buick 3800 V6 | A-Body | 2.84 | 35/35 | 2.84 | FL4B | 1895 |
| FJH | Buick 3800 V6 | H-Body | 3.33 | 37/33 | 2.97 | FL4B | 1895 |
| FSH | Buick 3800 V6 | C/H-Bodies | 2.84 | 35/35 | 2.84 | FL4B | 1895 |