Audi A4: Overview - Drive Axle
1 - Cap
- Carefully drive off using a drift
- Replace if damaged
- Adhesive surface must be free of oil and grease
- Coat the sealing surface with Sealant -D 454 300 A2- before installing on
CV joint.
2 - Circlip
- Replace after removing
- Insert in shaft groove
3 - Inner CV Joint
- Only replace completely
- Checking using the Vehicle Diagnostic Tester. Refer to
→ Chapter "Inner CV Joint, Checking".
- Grease quantity and type.
- The adhesive surfaces must be free of oil and grease.
- When installing the CV joint, thinly coat the profile shaft splines
with the grease used in the joint.
4 - CV Boot
- Without vent hole
- Remove the cap carefully using a drift.
- Check for tears and scuffing
- Check the inner CV joint for damage. Refer to
→ Chapter "Inner CV Joint, Checking".
- The metal cap/CV joint sealing surfaces must be free of grease when
installing.
5 - Backing Plate
6 - Bolts
- M8: 30 Nm +90º
- M10: 50 Nm + 90º
- Replace after removing
7 - Clamp
- Replace after removing
- Tensioning. Refer to
→ Fig. "Tension the Clamp using the Clamping Pliers -VAG1682A-".
8 - Drive Axle
- Removing and installing. Refer to
→ Chapter "Drive Axle, Removing and Installing".
9 - Clamp
- Replace after removing
- Tensioning.
10 - CV Boot
- Without vent hole
- Check for tears and scuffing
- Check the outer CV joint for damage. Refer to
→ Chapter "Outer CV Joint, Checking".
- The outer CV boot/metal cap sealing surfaces must be free of grease
when installing
- The CV boot/drive axle sealing surfaces must be free of grease when
installing
11 - Clamp
- Replace after removing
- Tensioning. Refer to
→ Fig. "Tension the Clamp using the Clamping Pliers -VAG1682A-".
12 - Circlip
- Replace after removing
- Insert into ring groove of shaft before installation (not visible on
installed joint)
- Before installing the CV joint, align the circlip centered to the
opening facing upward.
13 - Outer CV Joint
- Only replace completely
- Checking using the Vehicle Diagnostic Tester. Refer to
→ Chapter "Outer CV Joint, Checking".
- Removing. Refer to
→ Chapter "Drive Axle, Disassembling and Assembling, Outer CV Joint".
- Installing: Drive onto shaft with a plastic mallet until compressed
circlip rebounds.
- Circlip must lie in joint chamfer when guiding in, guide with pliers
if necessary.
- Grease quantity and type.
- The CV boot/outer CV joint sealing surfaces must be free of grease
when installing.
- When installing the CV joint, thinly coat the profile shaft splines
with the grease used in the joint.
14 - Bolt
- Replace after removing
- Clean the threads in the CV joint with a thread tap.
- Drive axle threaded connection, loosening and tightening. Refer to
→ Chapter "Drive Axle Threaded Connection, Loosening and Tightening".
Heat Shield - Tightening Specification
- Tighten the heat shield bolts to 23 Nm.
Tension the Clamp using the Clamping Pliers -VAG1682A-.
- Attach the Clamping Pliers -VAG1682- as shown.
- The jaws on the pliers must be centered
-arrow- on the clamp
-2-.
Note
- The spindle threads must turn easily. If necessary, coat
with MoS2 lubricating grease.
- If difficult to tighten, for example because of dirty
threads, the proper clamping force of the clamping sleeve will
not be reached even when tightened to the specification.
- Tension the clamp by turning the spindle
-1- with the torque wrench. Do not
tilt the clamping pliers during this.
- Tightening specification: 20 Nm.
Grease Quantity and Type
Note
- Grease the joint again when replacing the CV boot.
- Pay attention to the grease type for the outer and inner joint.
Refer to the Parts Catalog.
1) Apply grease through the ball races.
READ NEXT:
Caution
This procedure contains mandatory replaceable parts.
Refer to component overview and parts catalog prior to
starting procedure.
Mandatory Replacement Parts
Bolt - Outer CV Joint t
Drive Axle, Disassembling and Assembling, Outer CV Joint
Special tools and workshop equipment required
Locking ring pliers, commercially available
Sealant -D454 300 A2-. Refer to the Parts Catalog.
It is necessary to disassemble the joint whenever replacing
the grease or if the ball surfaces show wear or damage.
Disassembling
Note
Ball hub and joint are paired and should be identified
SEE MORE:
Removing
- Pry off the cap -3- with a small
screwdriver.
- Remove the bolt -2- underneath.
- Pull the footrest -1- downward in
the direction of -arrow- and remove
it.
Installing
Install in reverse order of removal.
Installation instructions: For example tightening
specifications,
Overview - Transmission Fluid Circuit
1 - Plug/Plugs
For the ATF check and fill hole -item 1-
→ Item
2 - Plug
35 Nm
Replace after removing
For the transmission fluid inspection and fill hole
3 - Transmission Fluid Pump (MTF Pump)
With seal welded on