What size is the rear differential on a 1994 Chevy S10 with 4.3L V6 4 speed auto transmission and 2WD?

The 1994 Chevy S10 2WD with a 4.3L V6 and 4-speed automatic transmission typically came with a 7.5-inch rear differential. However, there's a small chance it could be a 7.625-inch depending on the specific options and the exact build date of the truck.

To be absolutely certain, you should:

* Check the VIN: The Vehicle Identification Number (VIN) can be decoded to reveal the specific options and axle code.

* Look at the differential itself: The size is often cast into the differential housing itself. You'll likely need to get under the truck to see this.

Checking the VIN through a VIN decoder site or contacting a Chevrolet dealership with the VIN is the most reliable method to confirm the exact size.