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.
SYS.OK|MANUAL.DBβ LIVE
HOMESERVICE MANUALSAUDI2012A8 QUATTRO SEDAN (4H2) V8-4.2L (CDRA)REPAIR AND DIAGNOSISTRANSMISSION AND DRIVETRAINAUTOMATIC TRANSMISSION/TRANSAXLEDESCRIPTION AND OPERATIONFINAL DRIVE, DIFFERENTIAL (0BKA AUTOMATIC TRANSMISSION)FRONT FINAL DRIVE OVERVIEW
2012 Audi A8 Quattro Sedan (4H2) V8-4.2L (CDRA)
Front Final Drive Overview
2012 Audi A8 Quattro Sedan (4H2) V8-4.2L (CDRA)SECTION Front Final Drive Overview
Front Final Drive Overview
• Refer to => [ Repair Information ] Repair Information.
• Refer to => [ Clean Working Conditions ] Clean Working Conditions.
1 Torque Converter
• Overview, refer to => [ Torque Converter Overview ] Torque Converter Overview
2 Shaft Seal
• For the torque converter
• Removing and installing, refer to => [ Torque Converter Shaft Seal ] Torque Converter Shaft Seal
3 Shaft Seal
• For the left flange shaft
• Between the final drive and the transmission housing
• Removing and installing, refer to => [ Left Flange Shaft Seal ] Left Flange Shaft Seal
4 Adjusting Shim
• Behind the taper roller bearing outer race
5 Taper Roller Bearing Outer Race
6 Bolt
• Tightening specification and sequence, refer to => [ Front Final Drive Cover - Tightening Specifications and Sequence ]
7 Shaft Seal
• For the right flange shaft
• Removing and installing, refer to => [ Right Flange Shaft Seal ] Right Flange Shaft Seal
8 Locking Ring
• Replace
9 Right Flange Shaft
• Removing and installing, refer to => [ Right Flange Shaft ] Right Flange Shaft
10 Drain Plug
• For the hole for checking and filling
• For the transmission fluid inside the front final drive
• Tightening specification - item 5 - => [ (Item 5) Drain Plug ] Transmission Drain and Inspection Plug Overview
11 Cover
• For the front final drive
• Pay attention to the alignment sleeves
12 Adjusting Shim
• Behind the taper roller bearing outer race
13 Taper Roller Bearing Outer Race
14 O-ring
• On the front final drive cover
• Removing and installing, refer to => [ Front Final Drive Cover O-ring ] Front Final Drive Cover O-ring
15 Differential
16 Transmission
17 Spring Pin
• Removing and installing, refer to => [ Shaft Seal, Parking Lock Emergency Release Transmission Selector Lever ] Removal and Replacement
18 Gearshift Lever
• For the parking lock emergency release
• Removing and installing, refer to => [ Shaft Seal, Parking Lock Emergency Release Transmission Selector Lever ] Removal and Replacement
19 Shaft Seal
• On the parking lock emergency release transmission selector lever
• Removing and installing, refer to => [ Shaft Seal, Parking Lock Emergency Release Transmission Selector Lever ] Removal and Replacement
20 Left Flange Shaft
• Removing and installing, refer to => [ Left Flange Shaft ] Left Flange Shaft
21 Bolt
• 9 Nm + 60° turn
• Replace
22 Gear Carrier
• Use the circlip to attach together with the mount - item 23 - => [ (Item 23) Bearings ] - item 24 - => [ (Item 24) Circlip ] to the left flange shaft.
• Is identified together as the left flange shaft mounting bracket.
23 Bearings
• For the left flange shaft
24 Circlip
• For the left flange shaft bearing
Front Final Drive Cover - Tightening Specifications and Sequence
- Tighten the bolts in two steps in the sequence shown:
RENDER: 1.0x
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:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.