General malfunctions of the DAF 105 gearbox:
1. Slip:
* Wear of friction discs or steel plates
* Transmission fluid level is low or contaminated
* Faulty torque converter
*Faulty Transmission Control Module (TCM)
2. Jerking or vibration:
* Worn or broken engine or transmission mounts
* Faulty speed sensors
* Torque converter malfunction
* Worn bushings or bearings
3. Transmission fluid leak:
* Damaged oil seal or gasket
* Cracks or holes in the transmission housing
* Faulty oil pump
4. Difficulties when changing gears:
* Worn or damaged synchronizers
* Faulty gear shift mechanism
*TCM malfunction
5. Humming or noise during operation:
* Worn or damaged bearings
*Lack of transmission fluid
* Torque converter malfunction
6. Overheating:
*Lack of transmission fluid
* Clogged or faulty transmission cooler
*Transmission fluid pump malfunction
7. Fault codes:
* The TCM may store trouble codes that help diagnose the problem. An experienced mechanic can use an OBD-II scanner to read the codes and determine the problem.
8. Other:
* Faulty wiring or connectors
* Problems with the engine control unit (ECU)
* Worn or damaged fasteners