Transmission Fluid Checking Procedures

Transmission fluid checking is accomplished using the DISplus or GT-1. The DISplus or GT- 1 is used to monitor transmission fluid temperature to insure the transmission is not over or under-filled. As with most other current ZF transmissions there is no dipstick, the fluid level is checked and filled at the fill plug. The location of the fill plug varies between transmissions. See Fig 1 . Transmission fluid should be checked between 30 and 50 degrees Celsius (unless otherwise specified). Use the DISplus and/or GT-1 to determine transmission temperature. When checking transmission fluid, observe the following items:

Transmission in Park.
Parking brake applied.
Engine Running.
Vehicle level.
No engine load.
Trans Temp 30-50C.
Observe correct drain plug torque.
Use correct fluid.

When replacing parts on transmissions that use lifetime fluid, drain fluid into a clean container and reuse.

Fig 1: Identifying Drain & Fill Plug (Typical)

Courtesy of BMW OF NORTH AMERICA, INC.