Converting a 4×4 4L60E transmission to a 2WD configuration involves several steps and requires specific parts and adjustments. Here’s a general guide on how to perform this conversion:
Materials Needed:
- 2WD transmission tail housing
- Transmission fluid and gasket
- Torque converter
- Transmission mount (2WD-specific)
- Drive shaft (2WD-specific)
- Tools (wrenches, sockets, jack, jack stands)
Steps:
- Safety First: Ensure that your vehicle is parked on a level surface, and you have proper safety equipment, including jack stands and personal protective gear.
- Raise the Vehicle: Use a jack to lift the rear of the vehicle off the ground and secure it with jack stands for safety.
- Drain Fluid: Locate the transmission pan and drain the transmission fluid. You may need to remove the pan to access the fluid completely. Be sure to properly dispose of the old fluid according to local regulations.
- Disconnect Drive Shaft: Remove the drive shaft connected to the front of the transfer case. You may need to unbolt it from the transfer case and slide it out of the transmission.
- Disconnect Transmission: Unbolt the transmission from the engine block and slide it rearward slightly, supporting it with a transmission jack if available.
- Remove Transfer Case: If your 4×4 transmission has an attached transfer case, you’ll need to remove it as well. This typically involves disconnecting the drive shaft, electrical connectors, and the mounting bolts.
- Replace Tail Housing: The key step in the conversion is to replace the 4×4 tail housing of the transmission with a 2WD tail housing. The 2WD tail housing is shorter and designed to connect to the 2WD transmission mount and drive shaft. This usually requires removing bolts that secure the tail housing and gently tapping it to remove it.
- Install 2WD Transmission Mount: Attach the 2WD-specific transmission mount to the new tail housing. Ensure it’s securely bolted in place.
- Reconnect Transmission: Carefully slide the modified transmission back into position and bolt it to the engine block. Torque the bolts to the manufacturer’s specifications.
- Replace Torque Converter: Install a torque converter compatible with the 2WD transmission. Ensure it is properly seated in the transmission.
- Install 2WD Drive Shaft: Connect the 2WD-specific drive shaft to the rear of the transmission and secure it with the appropriate bolts.
- Reconnect Transfer Case (Optional): If you removed a transfer case, reinstall it using the appropriate mounting bolts, electrical connectors, and drive shaft.
- Fill with Transmission Fluid: Fill the transmission with the appropriate type and amount of transmission fluid as specified in your vehicle’s manual.
- Test Drive: Start the vehicle and take it for a test drive to ensure that the transmission is functioning correctly. Check for any leaks and listen for unusual noises.
- Check Fluid Level: After the test drive, check the transmission fluid level and top it off as needed.
- Final Adjustments: Make any final adjustments or tightening as necessary, ensuring that all components are secure.
- Dispose of Old Parts: Properly dispose of the old transmission tail housing, fluid, and any other components that were replaced during the conversion.
Converting a 4×4 4L60E transmission to 2WD requires mechanical skills and access to the appropriate parts. If you’re not comfortable performing these modifications, it’s advisable to seek the assistance of a professional mechanic or transmission specialist to ensure a successful conversion. Additionally, consult your vehicle’s service manual for specific instructions and torque specifications.
