Attach the hydraulic control unit to the rear final drive as follows:
First install the lines -6- and -7- into the chambers hand-tight -arrows B-.
Then install the bolts -3 to 5- hand-tight.
Coat the threads of the bolt -2- with Sealing Compound :D 176 501 A1 .
Install the bolt -2- with a seal.
Tighten the M8 x 30 screws -2 through 5- to the tightening specification in the sequence: -4-, -2-, -5- and -3-.
Tighten the nuts -A arrows- and -B arrows- on the left -6- and right -7- lines to the tightening specification.
-- Install the All-Wheel Drive Pump -V415-. Refer to Installing .
-- Install the wiring harness -3- to the final drive and subframe -5 through 7-.
-- Connect the connectors -4- and -2-. Pay attention to the marks made during the removal, that identify the allocation to the Oil Pressure/Temperature Sensor -- and which connectors go to the Clutch Valves --.
-- If equipped, position the wiring harness bracket -1- on the rear final drive and tighten the bolts -arrows- to the tightening specification. Make sure the wiring harness -3- does not get pinched.
Allocation of the connectors for the Oil Pressure/Temperature Sensor -- and Clutch Valves -- :
- Oil Pressure/Temperature Sensor 2 -G640- Connector
- Oil Pressure/Temperature Sensor -G437- Connector
- All-Wheel Drive Clutch Valve 2 -N446- Connector
- All-Wheel Drive Clutch Valve -N445- Connector
-- Fill the rear final drive with gear oil and then check the level. Refer to GEAR OIL LEVEL, CHECKING, "quattro sport", 0D3, 0BX .
-- Fill the ATF in the rear final drive and check the ATF level. Refer to ATF LEVEL, CHECKING .
-- Install the rear section of the exhaust system and align it so it is free of tension. Refer to OVERVIEW - MUFFLER (4 CYL) , or OVERVIEW - MUFFLER (6 CYL) .