The Tremec T177 was a 4-speed manual transmission that can be found between 1980 and 1986 in Jeep CJ models, and was used in Jeep Trucks between 1980-1987. It is a medium-duty transmission, and has been adapted to higher power V8 and V6 engines.
The Tremec transmission has three model numbers: T176, T177, and T178. These three transmissions are nearly identical, but the gear ratios are slightly different.
Gear Ratios
T-176
| Reverse | 3.52 |
| 1st | 3.52 |
| 2nd | 2.27 |
| 3rd | 1.46 |
| 4th | 1.00 |
T-177
| Reverse | 3.82 |
| 1st | 3.82 |
| 2nd | 2.08 |
| 3rd | 1.47 |
| 4th | 1.00 |
T-178
| Reverse | 3.01 |
| 1st | 3.00 |
| 2nd | 2.08 |
| 3rd | 1.47 |
| 4th | 1.00 |
Rebuilding This Transmission
It is easy to rebuild these transmissions. The recommended tools are a set of snap ring pliers, a bearing puller, and a hydraulic press. You can find a rebuild kit here:
