Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Mechanical Function, Overview
- Output shaft.
- Input shaft
- Inner and outer wet clutch plates
- Operating piston
The transmission and bevel gear transfers engine torque to the propeller shaft. The input shaft is joined to the clutch's output shaft via the multi-plate clutch pack. The multi-plate clutch in the coupling must be engaged to transfer torque to the rear axle. The inner and outer wet multi-plate clutch are the transfer point between the input and output shafts.
The feed pump builds up an oil pressure which then Differential electronic module (DEM) controls via the pressure reducing valve, so that correct pressure is obtained. Then the working piston is applied against the disc pack so that the clearance is eliminated and the clutch is prepared to enable quick reaction and control. At 27.5 bar deployed pressure from the pressure reducing valve max. torque is reached, 1, 500 Nm, through the clutch to the rear wheels already at start.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.