The Tremec T176 transmission was the optional four-speed transmission found in 1980 to 1986 Jeep CJ models. It is a good transmission when well maintained and has often been adapted to V8 and V6 power.
Rated at medium-duty, the T176 is stronger than its compact size may suggest. Though it only holds a candle to the truck style four-speeds' strengths and capabilities, the T176 is frequently retained in CJ Jeeps when married to mild GM V6 and V8 power.
The T177 and T178 are the J Series versions of this transmission as supplied with the 258 I6, and they feature significantly longer input shafts and bellhousing spacers to compensate for the deeper bulkheads of the FSJ Jeeps. The gearing differs as well. References to the T176 are largely similar to the other two versions. Failures of the T17x are more common in the Jeep trucks as they had greater weight and duty demands.