Transmission Control Module (TCM) & Main Control Valve Body
WARNING: This page is about a different car, the 2005 Jaguar XJR, 2005 Jaguar XJ8, 2004 Jaguar XJR, and 2004 Jaguar XJ8. However, it is still accessible from the selected car via links, so may be relevant.
The transmission control module (TCM) and main control valve body is a combination of hydraulic and electronic control units. Both these modules are installed in the transmission, in the fluid pan.
This technical principle has the following advantages:
- Minimum tolerances (TCM is mated to solenoids).
- Better coordination of gear shifts.
- Increased refinement.
- Optimized shift quality.
- Good reliability, since the number of plug connections and interfaces is reduced.