28 00... Checking/topping up oil level in twin-clutch gearbox (GS7D36SG)

Checking oil level:

Call up Service functions (Drive) in BMW diagnosis system
Carry out oil level check in accordance with instructions

IMPORTANT: On the twin-clutch gearbox a run-in check fluid change is not required at 2000 km.
Use only the approved TRANSMISSION OIL .
Failure to comply with this instruction will result in serious damage to the twin-clutch gearbox.

IMPORTANT: The testing and filling procedure must be completed before the transmission oil temperature of 40 °C is reached.
If a temperature in excess of 40 °C is reached and no oil has emerged, insert the fluid adjusting screw and repeat the testing and filling procedure when it has cooled down.

Installation note:

Tighten down oil filler plug using

Hexagon wrench 8 A/F
Torque wrench
Socket 8 A/F

Fig 1: Tightening Oil Filler Plug Using Hexagon Wrench
Courtesy of BMW OF NORTH AMERICA, INC.

Topping up transmission oil after a repair:

Stand vehicle on a level surface and secure against rolling off.

Open fluid adjusting screw (1). If fluid emerges, close screw again immediately

Fig 2: Identifying Fluid Adjusting Screw
Courtesy of BMW OF NORTH AMERICA, INC.

If no fluid emerges, top up until fluid emerges and close fluid adjusting screw (1) again

NOTE: If fluid has been replenished here, a further refill must be carried out during the actual fluid adjustment
Connect diagnosis system and start service functions (drive).
Start engine (drive position N or P)
Record transmission temperature using the diagnosis system
(Drive position P)
Permissible starting temperature ≤ 32 °C
Idle speed: maintain at approx. 2000 rpm for 1 minute.
Open fluid adjusting screw (1)
Fill until oil emerges
Max. transmission oil temperature 40 °C
Insert screw

Installation note:

Replace screw.

Tightening torque: 25±3 Nm