1989 - 4T60
| Model Code | Engine | Platform | Differential Ratio | Sprocket Ratio | Final Drive Ratio | Converter Code | Convertor Stall Speed |
| AAH, ANH | Cadillac 4.5 V8 | C-Body | 3.33 | 37/33 | 2.97 | FM8C | 1825 |
| ABH, ATH | Cadillac 4.5 V8 | E/K-Bodies | 3.33 | 37/33 | 2.97 | FM8C | 1825 |
| AFH | Cadillac 4.5 V8 | Limo | 3.33 | 37/33 | 2.97 | FM8C | 1825 |
| AJH | Cadillac 4.5 V8 | E/K-Bodies | 3.33 | 35/35 | 3.33 | FM8C | 1825 |
| BAH, BDH | Buick 3300 V6 | A-Bdoy | 3.06 | 37/33 | 2.97 | FY9B | 1895 |
| BFH | Buick 3300 V6 | A-Bdoy | 3.06 | 35/35 | 3.06 | FL9B | 1895 |
| BHH | Buick 3800 V6 | C/H-Bodies | 2.84 | 35/35 | 2.84 | FY9B | 1895 |
| BJH | Buick 3800 V6 | H-Body | 3.33 | 37/33 | 2.97 | FL9B | 1895 |
| BMH | Buick 3800 V6 | A-Body | 3.06 | 35/35 | 3.06 | FL9B | 1895 |
| BPH | Buick 3800 V6 | E-Body | 2.84 | 35/35 | 2.84 | FL9B | 1895 |
| BWH | Buick 3800 V6 | E/Z-Bodies | 3.33 | 37/33 | 2.97 | FL9B | 1895 |
| PAH | Buick 3800 V6 | H-Body | 3.33 | 35/35 | 3.33 | FL9B | 1895 |
| CDH, CYH | 2.8 V6 | W-Body | 3.33 | 35/35 | 3.33 | FJ9B | 2060 |
| CLH, CPH, CZH | 2.8 V6 | A-Body | 3.33 | 35/35 | 3.33 | FJ9B | 2060 |