Non engagement, slippage or harsh shifts when cold
Gearbox oil leaks
Whining noise from gearbox
Grinding noise in gearbox
Incorrect fluid in gearbox (most commonly seen with CVT and DSG/DCT gearboxes)
Common Faults by make:
Valve body Faults:
1. Volvo 5 speed automatic (55-50/1SN) valve body fault – The common symptom being harsh shifts when the vehicle warms up after approximately 15 minutes of driving
2. Volvo 6 speed automatic (TF80/1SN) valve body fault – The common symptom being harsh shifts when the vehicle warms up after approximately 15 minutes of driving
3. Renault/Citroen/Peugeot 6 speed automatic (TF80/1SN) valve body fault – The common symptom being harsh shifts when the vehicle warms up after approximately 15 minutes of driving
4. VW Golf Polo 6 speed automatic (09G) valve body fault – The common symptom being harsh shifts when the vehicle warms up after approximately 15 minutes of driving
Gearbox mechanical faults:
1. BMW E46 5 speed automatic (5HP19) Oil pump failure
2. BMW E90/1 & Jaguar 6 speed (6HP19/21/26/28) Internal pressure loss – slippage occurring on heavy acceleration
3. Ford Ranger/Mazda BT50 5 speed automatic (5R55S/W) – complete gearbox failure/burnout – Full overhaul required including solenoid block
4. Ford Ranger/Mazda BT50 – complete gearbox failure/burnout – Full overhaul required including solenoid block
5. Ford Ranger/Mazda BT50 6 speed automatic (6R80) – complete gearbox failure/burnout – Full overhaul required including mechatronics
6. VW/Audi 7 speed DSG – Clutch failure
Electroplate, conductor plate and transmission control unit (TCM) faults: