Vehicles with Self-Locking Center Differential

Courtesy of AUDI

-- Loosen the bolts -arrow- for the hydraulic pressure reservoir and bearing bracket but do not remove.

• If the hydraulic pressure reservoir lifts when loosening the bolts the ATF system is still under pressure.
• In this case the bolts from the Mechatronic must be minimally loosened to reduce the pressure in the ATF system via the sealing surfaces.
• Deactivate the ATF pump and drain the hydraulic pressure reservoir. Refer to ATF PUMP, DEACTIVATING AND DRAINING THE HYDRAULIC PUMP RESERVOIR .

-- Remove the bolts -arrows-, the bearing bracket and the hydraulic pressure reservoir.

Continuation for all vehicles

Fig 1: Gear Positioner Module Loosening Sequence

Courtesy of AUDI

-- Remove the bolts -1 through 6- and remove the gear actuator module.

Installing

Fig 2: Gear Positioner Module Loosening Sequence

Courtesy of AUDI

-- Insert the gear actuator module and tighten the bolts in the sequence -1 to 6- hand-tight.

-- Before installing the hydraulic pressure reservoir, coat the seals and oil filler hole with ATF.

Courtesy of AUDI

-- Guide the hydraulic pressure reservoir carefully and evenly into the oil filler hole, and tighten the bolts -arrow- hand-tight.

-- Tighten the gear positioner and pressure reservoir to the tightening specification. Refer to OVERVIEW - GEAR SET .

-- Bring the gear actuator into the basic setting.

Courtesy of AUDI

-- Push the gear actuator by hand and turn it at the same time until it engages and determine the current backlash.

-- Install the gear set. Refer to TRANSMISSION, DISASSEMBLING AND ASSEMBLING .

-- Install the connector with the Assembly Tool:T40305  .

Courtesy of AUDI

-- Install the transmission fluid pan. Refer to TRANSMISSION FLUID PAN, REMOVING AND INSTALLING .

Tightening Specifications

• Refer to OVERVIEW - GEAR SET