* Engine: Is it a 4.3L V6, a 5.3L V8, or something else? Different engines use different transmissions.
* Transmission Type: What transmission is currently in your Blazer? (e.g., 4L60E, 4L65E, etc. This information is usually on a sticker on the transmission itself.)
* Drivetrain: Is it 4WD or 2WD? 4WD transmissions are generally not interchangeable with 2WD units.
* Transfer Case (if 4WD): If it's 4WD, the transfer case must also be compatible with the new transmission.
Once you have this information, you can:
* Consult a parts catalog: Online parts stores (like RockAuto, AutoZone, etc.) usually allow you to select your vehicle's year, make, model, and engine, and will show you compatible transmissions.
* Check online forums: Blazer enthusiast forums (like those on sites dedicated to GM vehicles) often have discussions about transmission swaps and which transmissions are compatible. Search for your specific year, engine, and transmission.
* Consult a mechanic: A qualified mechanic familiar with GM vehicles will be able to tell you definitively what transmissions will work with your Blazer.
Important Considerations:
* Bolt Pattern: The transmission must have the same bolt pattern to mate correctly to the engine.
* Computer Control: Modern transmissions are electronically controlled. You might need to have the computer reprogrammed to work with a different transmission. A simple swap might not work without adjustments.
* Wiring Harness: The wiring harness may need to be modified or replaced to accommodate a different transmission.
Attempting a transmission swap without the proper knowledge and tools can lead to serious complications and potentially damage your vehicle. It's usually best to consult with a professional before undertaking this kind of repair.
