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

WARNING: This page is about a different car, the 2011 BMW M3, 2010 BMW M3, 2009 BMW M3, and 2008 BMW M3. However, it is still accessible from the selected car via links, so may be relevant.

Checking fluid level

Call up Service functions (Drive) in BMW diagnosis system
Carry out fluid 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 gear oil for dual clutch transmission.
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 fluid temperature of 40°C is reached.
If a temperature in excess of 40°C is reached and no fluid has emerged, insert the fluid adjusting screw and repeat the testing and filling procedure when it has cooled down.

Installation:

Tighten down filler plug using

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

Fig 1: Locating Special Tools
Courtesy of BMW OF NORTH AMERICA, INC.

Topping up transmission fluid 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
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

Fig 2: Identifying Filler Plug Screw
Courtesy of BMW OF NORTH AMERICA, INC.
Connect diagnosis system and start service functions (drive).
Start engine (drive position N or P)
Record transmission temperature using Tester
(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 fluid emerges
Max. transmission fluid temperature 40°C
Insert screw

Installation:

Replace screw.