APS Preinstallation Guide for Used Transmissions
✅ Transmission Installation Guide
Follow these steps carefully to protect your warranty.
🔧 Step 1: Prepare the Vehicle
- Remove the old transmission from the vehicle.
- Inspect the transmission mounts and cooler lines for damage or wear.
- If your vehicle has an internal transmission cooler (in the radiator), you must:
- Bypass it with an external cooler, or
- Replace it with a brand-new factory cooler.
- Flush the system completely, including cooler lines and radiator, as required in the latest TSB (Technical Service Bulletin) from your vehicle's manufacturer.
🧰 Step 2: Replace Key Parts
To avoid leaks or early failure:
- Replace all external seals and gaskets.
- Install a new transmission filter and pan gasket.
- Install a new cooler (external or factory) as mentioned above.
🛢️ Step 3: Use the Correct Transmission Fluid
⚠️ STOP! Before you install the transmission or start the vehicle:
- Check your owner’s manual or service guide for the exact type of transmission fluid required.
- Do not use “universal” or incorrect fluid — it can damage the unit and void your warranty.
- Fill the transmission to the proper level using only the approved fluid.
💻 Step 4: Programming & Shift Learning
- Reprogram (flash) the transmission using factory dealer software before installing it.
- If your transmission has adaptive shifting, make sure it is:
- Flashed
- Learned
- Updated with proper shift adapt values
- Skipping this step can cause shifting problems and void your warranty.
✅ Final Checks
- Cooler lines are flushed
- Correct fluid is used
- Filter and pan gasket are new
- Programming is complete
Need help? We are more than willing to help you!