Checking/topping up oil level in automatic transmission (GA8HP50Z) (4' Series Coupe/Convertible, 4' Series Gran Coupe Sedan)
Special tools required:
- 2 405 614
- Do not let skin come in contact with transmission oil and do not inhale fuel vapors.
- Wear protective gloves.
- Ensure adequate ventilation
To set the correct level, it is mandatory that the service function "Transmission control unit: oil adjustment" is performed using the diagnosis system.
Failure to comply with this requirement will result in serious damage to the automatic transmission .
Conditions for the oil adjustment:
- Initial condition: Transmission oil temperature 30°C to 40°C
- Final condition: Transmission oil temperature 40°C to 50°C
Precondition for oil adjustment
- Transmission oil temperature 30°C to maximum 40°C.
(The transmission oil temperature must be maintained. This will increase the oil quantity in the transmission.)
Performing oil-level adjustment:
An oil-level adjustment is necessary for certain fault code entries in the automatic transmission and after repair (e. g. mechatronic replacement, converter replacement, transmission replacement).
- Connect diagnosis and information system.
- Service function (transmission control unit: Oil adjustment) call up
- Carry out oil level check in accordance with instructions
Adding transmission oil:
Stand vehicle on a level surface and secure against rolling off.
Release oil filler screw (1) by means of special tool 2 405 614 .
Add automatic transmission fluid according to instructions in the BMW diagnosis system.
Conversion of setpoint torque → torque to be set:
(setpoint torque x L1): L2 = torque to be set.
L1 = Length of handle center to the ratchet head.
L2 = Length of the handle center to the action point of special tool.
Desired tightening torque: 24 11 3AZ .
Parts: Replace oil filler plug and sealing ring.
Tighten down oil filler plug using
- Special tool 2 405 614 .
- Torque wrench