BMW E39 automatic transmission torque converter repair
The torque converter is an important component of an automatic transmission (AT), and if it malfunctions, it can cause serious transmission problems. Here is a step-by-step guide to repairing the BMW E39 automatic transmission torque converter:
Required tools and materials:
* Set of wrenches and screwdrivers
* Lift or jacks
* Oil pan remover
* New pan gasket
* New automatic transmission oil and filter
* Torque converter seals
* Spare parts for torque converter lock-up clutch (if required)
Instructions:
1. Safety: Place the vehicle on a lift and lock the steering wheel. Disconnect the negative battery terminal.
2. Draining the automatic transmission fluid: Remove the oil pan, draining the automatic transmission fluid into a clean container. Replace the oil pan gasket.
3. Removing the torque converter:
* Remove the bolts securing the torque converter to the flywheel.
* Rotate the torque converter until the splines disengage from the pump shaft.
* Remove the torque converter from the gearbox.
4. Disassembling the torque converter:
* Remove the front torque converter cover.
* Remove the friction linings and steel discs.
* Check the friction linings for wear or damage.
* Check steel wheels for bending or deformation.
5. Replacing seals and locking couplings:
* Replace all seals with new ones.
* If the torque converter lock-up clutch is faulty, replace it.
6. Torque converter assembly:
* Reinstall the friction linings and steel discs.
* Install a new torque converter front cover.
* Make sure all seals are installed correctly.
7. Installation of the torque converter:
* Insert the torque converter splines onto the pump shaft.
* Rotate the torque converter until it engages the flywheel.
* Tighten the bolts securing the torque converter to the flywheel.
8. Filling with automatic transmission fluid:
* Fill in new automatic transmission oil through the oil dipstick.
* Start the engine and let it idle until the automatic transmission fluid warms up.
* Check the fluid level and add if necessary.
9. Resetting automatic transmission adaptations:
* Connect the OBD2 scanner to the car and reset the automatic transmission adaptations. This will allow the transmission to adapt to the new torque converter lock-up clutch.
10. Check and adjustment:
* Drive the car and check whether the automatic transmission operates correctly.
*Adjust the shift cable if necessary.
Notes:
*This repair requires technical knowledge and experience. If you are unsure of your capabilities, seek professional help.
*Always use original parts or high quality replacements.
* For best results, replace the automatic transmission oil and filter at the same time as repairing the torque converter.