Audi A8
Audi A8
=> [ Driveshaft ]
=> [ Rear Final Drive ]
=> [ Flange Shaft Seals ]
Driveshaft
Special tools, testers and auxiliary items required
• Alignment Fixture-4W Dr.Shaft (3139)
• Counterhold tool Touareg V10 (T10172) and Adapters (T10172/5)
• Engine/Transmission Jack (V.A.G 1383 A) with Universal Transmission Support (V.A.G 1359/2)
Removing
• See notes, refer to => [ Driveshaft Overview ]
• The driveshaft should only be worked on a two column lift.
- Separate the exhaust system at the clamping sleeves - 1 - and - 2 -.
- Remove both cross braces - A - and - B -.
- Remove rear section of exhaust system - C -.
- Remove heat shield - arrows -.
- Remove the bolts - arrows - and secure the main catalytic converter to the underbody.
• Do not bend the decoupling element in the front exhaust pipe more than 10°, otherwise it will get damaged.
- Remove heat shield - A - from transmission - arrows -.
- Remove the rear final drive cover - arrows A and B -, if equipped.
- Check whether there is a marking (colored marking) on driveshaft and at flange/driveshaft at rear final drive - arrows A and B -.
- If these markings are not present, mark in color the position of driveshaft flange - arrow A - to rear final drive - arrow B -.
- Attach (3139) with spacers (3139/4) and tighten plastic nuts.
• Never lay the assembly tool on the balance plates.
- Remove the bolts - arrows - for intermediate bearing.
- Remove the bolts connecting the driveshaft to the transmission using the (T10172) and (T10172/5).
- Remove driveshaft from transmission and support it using (V.A.G 1383 A).
- Remove the bolts - 1 - (quantity: 6) from the rear CV joint.
- Use the (T10172) and (T10172/5).
- Remove driveshaft.
• Always store and transport a driveshaft fully extended only.
Installing
Installation is in reverse order of removal. Observe the following when doing so:
• Remove any old or dried-up high temperature grease from the CV joints and the driveshaft flanges. Fill with the exact same amount of high temperature grease (G 052 133 A2).
• Clean any locking fluid still inside the threaded holes in the flange shafts for the transmission driveshaft and rear final drive. Use a thread cutter to clean the holes. Otherwise the bolts could break off when being installed.
• After disconnecting driveshaft from rear final drive, an additional balance washer (thick washer) that may be located between shim and bolt may not be reinstalled.
• Always replace (self-locking) securing bolts for driveshaft.
• Note installation position of driveshaft: Center CV joint is located behind intermediate bearing in direction facing the rear final drive.
• Make sure that the markings on flange for driveshaft - arrow A - and for rear final drive - arrow B - line up.
• If a new driveshaft is installed and the color marking made by the factory on the rear final drive flange is no longer visible, then the radial run-out on the flange/driveshaft must be measured and the color marking on the new driveshaft must be made to match the new marking on the flange/driveshaft. Refer to => [ Radial Run-Out on Flange/Driveshaft, Measuring and Identifying ] Testing and Inspection.
- Replace seals for driveshaft at transmission/rear final drive flange. Remove grease from sealing surfaces and adhere new seals.
- Attach the driveshaft to the rear final drive and to the transmission with new bolts - arrows -.
- Install the bolts - arrows - just far enough so that the intermediate bearing can still be moved.
- Tighten the driveshaft bolts - 1 - on the rear final drive - 5 - => [ Hex Bolt ] .
- Use the (T10172) and (T10172/5).
- Tighten the bolts on the front of the driveshaft to the tightening specification - 5 - => [ Hex Bolt ] .
- Use the (T10172) with the (T10172/5).
- Remove (3139).
Align Intermediate Bearing as Follows:
- Slightly loosen bolt for intermediate bearing.
- Slide driveshaft toward front until it stops and mark position of intermediate bearing on the body - arrow A -.
- Slide driveshaft toward rear until it stops and mark position of intermediate bearing on the body - arrow B -.
- Slide driveshaft toward the right until it stops and mark position of intermediate bearing on the body - arrow 1 -.
- Slide driveshaft toward the left until it stops and mark position of intermediate bearing on the body - arrow 2 -.
- Align driveshaft - arrow C - and - arrow 3 -.
• The intermediate bearing must be centered between markings - arrow A - and - arrow B -, and - arrow 1 - and - arrow 2 -.
- Tighten bolts of intermediate bearing to tightening specification - 8 - => [ Hex Bolt ] .
Continuation:
- Install heat shield above intermediate bearing - arrows -.
- Remove heat shield - A - - arrows -.
- Install the rear final driver cover, if equipped. Tightening specifications - arrows A - - 16 - => [ Combi-bolt ] and - arrows B - - 13 - => [ Hex Bolts ] .
- Install and adjust exhaust system free of stress.
- Install both cross braces - A - and - B -.
Tightening Specifications
Rear Final Drive
Special tools, testers and auxiliary items required
• Torque Wrench (V.A.G 1332)
• Engine/Transmission Jack (V.A.G 1383 A) with Universal Transmission Support (V.A.G 1359/2)
Removing
Observe general repair notes, refer to => [ General Repair Information ] General Repair Information.
- Remove rear section of the exhaust system from clamping sleeves - 1 - and - 2 -.
- Remove the rear final drive cover - arrow A and B -, if equipped.
- Check whether there is a marking (colored marking) on driveshaft and at flange/driveshaft at rear final drive - arrows A and B -.
- If these markings are not present, mark in color the position of driveshaft flange - arrow A - to rear final drive - arrow B -.
- Remove driveshaft from rear final drive. Refer to => [ Driveshaft from Rear Final Drive ] .
- Tie up driveshaft to the side - arrow -.
- Remove heat shields on rear final drive - arrows -.
- Remove left and right drive axles.
- Set (V.A.G 1383 A) with (V.A.G 1359/2) under rear final drive.
- Remove the bolts - arrows A and B - for transmission support.
- Remove bolts - arrows - for rear cross member.
- Lower rear final drive slightly.
- Rotate rear final drive slightly to the side and pull drive axles out of flange shafts on alternating sides while doing this.
- Lower rear final drive completely.
Installing
Installation is in reverse order of removal. Observe the following when doing so:
- Rotate final drive to the side.
- Raise rear final drive and guide in the drive axles on alternating sides while doing this.
- Install and tighten the bolts - arrows -. Tightening specification - 5 - => [ Hex Bolts ] .
Transmission Support Installation Instructions
- Tighten the bolts - A - and - B - by hand (complete transmission support makes contact on final drive).
- Then, first tighten bolt - A - and then bolts - B -. Tightening specification - 11 - => [ Hex Bolts ] and - 12 - => [ Hex Bolt ] .
- Install drive axles.
- Attach the heat shields to the rear final drive - arrows -. Tightening specification - 9 - => [ Combi-bolt ] .
- Replace seal on flange/driveshaft and tighten bolts of driveshaft to rear final drive, set the markings to face each other while doing this => [ Attach the Driveshaft to the
Rear Final Drive. ] .
- Check axle oil level in rear final drive. Refer to => [ Rear Final Drive Gear Oil, Checking ] .
- Install the rear final driver cover, if equipped. Tightening specification - arrows A - - 16 - => [ Combi-bolt ] and - arrows B - - 13 - => [ Hex Bolts ] .
- Install and adjust rear section of exhaust system free of stress.
Flange Shaft Seals
Special tools, testers and auxiliary items required
• Driver (2062)
• Drip Tray (V.A.G 1306)
• Torque Wrench (V.A.G 1331)
• Torque Wrench (V.A.G 1332)
• Engine/Transmission Jack (V.A.G 1383 A) with Universal Transmission Support (V.A.G 1359/2)
• Sealing grease (G 052 128 A1)
Removing
• The rear final drive is installed
• Follow the General Repair Instructions. Refer to => [ General Repair Information ] General Repair Information.
• All illustrations show the left side of the rear final drive. Removing and installing the flange shaft and seal on the right side is identical.
- Remove rear section of the exhaust system from clamping sleeves - 1 - and - 2 -.
- Remove the rear final drive cover - arrow A and B -, if equipped.
- Remove the bolts - 2 - and then remove the heat shield.
- Remove the bolts from the drive axle - 1 -.
- Set (V.A.G 1383 A) with (V.A.G 1359/2) under rear final drive.
- Remove bolts - arrows - for rear cross member.
- Remove the bolts - arrows A and B - for transmission support.
- Push the rear final drive as far as possible to the right.
- Tilt the rear final drive upward - arrow A -.
- Push the drive axle toward the outside - arrow B - and swivel it out of the flange shaft.
- Place the (V.A.G 1306) underneath.
- Remove the flange shaft bolt. While doing this, install the two bolts into the flange, counterhold the flange shaft using a tire iron.
- Remove the flange shaft.
- If equipped, pry out the dust ring with a screwdriver.
• The dust ring will get damaged when being removed and must be replaced.
- Pry out the seal.
Installing
Installation is in reverse order of removal. Observe the following when doing so:
- Coat the outer circumference of the seal with gear oil.
- Fill the space between the sealing and dust lips halfway with sealing grease (G 052 128 A1).
- Install the new seal all the way in without tilting it.
- Install the new dust ring - arrow -, if equipped.
- Install the flange shaft.
- Install and tighten the flange shaft bolt - 8 - => [ Hex Socket Bolt ] Differential Overview.
- Install drive axle.
- Install the heat shield and tighten the bolts - 2 -. Tightening specification - 11 - => [ Bolts ] .
- Install and tighten the bolts - arrows -. Tightening specification - 5 - => [ Hex Bolts ] .
Transmission Support Installation Instructions
- Tighten the bolts - A - and - B - by hand (complete transmission support makes contact on final drive).
- Then, first tighten bolt - A - and then bolts - B -. Tightening specification - 11 - => [ Hex Bolts ] and - 12 - => [ Hex Bolt ] .
- Install the rear final driver cover, if equipped. Tightening specification - arrows A - - 16 - => [ Combi-bolt ] and - arrows B - - 13 - => [ Hex Bolts ] .
- Check the gear oil in the rear final drive. Refer to => [ Rear Final Drive Gear Oil, Checking ] .
- Install and adjust rear section of the exhaust system free of stress.