* Engine: The transmission must match the engine. A transmission from a V6 won't work in a V8, and vice-versa. Even within the same engine family (e.g., both 5.7L V8s), there might be subtle differences that cause incompatibility.
* Transmission type: The specific transmission model (e.g., 4L60E, 700R4) needs to be identical or at least very closely related. Even a minor variation in the model number can mean crucial differences.
* Transfer case (4x4 trucks): If it's a 4x4, the transfer case needs to be compatible with both transmissions.
To be absolutely sure, you need to:
1. Find the exact transmission model number for both trucks. This number is usually stamped on the transmission case itself.
2. Compare the model numbers. Even a single digit difference could mean incompatibility.
3. Consult a repair manual or a parts catalog for both the 1994 and 1995 Silverado models to verify compatibility.
Simply assuming they'll be interchangeable based on the year is risky. A seemingly small difference could lead to major problems or even damage to the transmission or drivetrain. It's crucial to verify compatibility before attempting the swap.
