* Axle Code: This is crucial. It's usually stamped on a tag on the differential housing itself. This code will tell you the gear ratio and other specifications. This is the *best* way to know what will fit.
* Original Axle Housing Size: While many share similarities, there are variations. Measure the width of your existing housing.
* Spring Perch Location: The location of the spring perches on the axle housing determines compatibility. They need to line up with your van's chassis.
Without this information, you're essentially guessing. Rear ends from other GM vehicles *might* fit, but it's not guaranteed. Even if the axle housing size looks similar, the spring perch location, yoke size, brake components, and other details might be incompatible.
To find compatible rear ends, you should:
1. Find your axle code: This is the most reliable method.
2. Use online parts databases: Websites like Summit Racing, Jegs, or RockAuto allow you to search for rear ends based on your year, make, and model, and sometimes even the axle code.
3. Consult a GM parts specialist: A local auto parts store with a knowledgeable staff might be able to help identify compatible rear ends based on your vehicle's information.
Trying to install an incompatible rear end could lead to serious mechanical issues, including the rear end not fitting correctly, potential damage to the chassis, and safety hazards. Always verify compatibility before proceeding with any installation.
