Can a transmission from 88 Chevy Suburban 4wd fit 92 blazer full size 4wd?

The answer is maybe, but it's unlikely to be a direct swap without significant modifications. While both are full-size Chevy trucks from a similar era, there are subtle differences in transmissions used between a 1988 Suburban and a 1992 Blazer, even if they're both 4WD. The specific transmission type (e.g., TH700R4, 4L60E) and their associated bell housings, output shafts, and transfer case interfaces can vary.

To determine compatibility, you'd need to:

* Identify the exact transmission in both vehicles: Look for a tag on the transmission itself for the model number.

* Compare the bellhousing bolt patterns: The bellhousing is the part that bolts the transmission to the engine. A mismatch here is a major problem.

* Verify transfer case compatibility: The output shaft of the transmission must mate correctly with the input shaft of the transfer case. These are often specific to the transmission and year/model.

* Consider the engine: The engine in the Suburban and Blazer should also be compatible (same or very similar). A different engine could mean a different bellhousing.

It's best to consult a transmission specialist or a reputable mechanic with experience working on these GM vehicles. They can accurately determine compatibility based on the specific transmission codes. Simply assuming compatibility based on year and model is risky and could lead to wasted time and money.