* Significant Differences: Chevrolet made substantial changes to the G20 van's platform and drivetrain between 1989 and 1993. These changes could include variations in transmission bellhousing bolt patterns, input shaft lengths, and even the overall transmission design.
* Engine Compatibility: The transmission is designed to work with a specific engine. If the engines in the 1989 and 1993 vans are different, the transmissions likely won't be compatible.
Recommendation:
* Consult with a Mechanic: A qualified mechanic can inspect both vans and confirm whether the transmissions are interchangeable.
* Research Specific Transmissions: You can research the specific transmission models used in your 1989 and 1993 vans using online resources like the Haynes repair manual or online forums.
* Find a Replacement Transmission: If a direct swap isn't feasible, you'll need to find a suitable replacement transmission for your 1989 van.
Important Note: Even if the transmissions appear to be similar, there might be other compatibility issues, such as the mounting points, control cables, or wiring harnesses. It's crucial to consult with a mechanic to ensure a safe and successful swap.
