How to replace Halfshafts on Audi A4 & VW passat models?

The procedure is similar for both Audi A4 and VW car models.

Halfshafts
CV-JOINTS
REMOVAL & INSTALLATION details for Audi and Vw is as follows:---

CV-Joints

Overhaul
Inner CV-Joint
Double Offset Joint

1. Before servicing the vehicle, refer to the precautions section.
2. Remove or disconnect the following:
   
   NOTE

   Do not disassemble the inner race, cage and ball assembly.
   
   
   
   
   Axle halfshaft

   Inner boot clamps and push the boot back

   Circlip

   CV-joint housing

   Snapring

   Double offset joint inner race, cage and ball assembly

   CV-joint boot

To install:

1. Install or connect the following:
   
   
   CV-joint boot

   Double offset joint inner race, cage and ball assembly

   Snapring
2. Apply clean grease to the CV-joint housing and the boot.
3. Install or connect the following:
   
   
   CV-joint housing

   Circlip

   Boot clamps by tightening them

   Axle to the vehicle

Tri-Pod Joint

1. Before servicing the vehicle, refer to the precautions section.
2. Remove or disconnect the following:
   
   NOTE

   Do not disassemble the spider and rollers.
   
   
   
   
   Axle halfshaft

   Inner boot clamps and push the boot back

   CV-joint housing

   Snapring

   Spider and rollers

   CV-joint boot

To install:

1. Install or connect the following:
   
   
   CV-joint boot

   Spider and rollers

   Snapring
2. Apply clean grease to the CV-joint housing and the boot.
3. Install or connect the following:
   
   
   CV-joint housing and tighten the boot clamps

   Axle to the vehicle

Outer CV-Joint

The outer CV-joint is serviced with the axle halfshaft as an assembly. The outer CV-joint boot may be serviceable by first removing the inner joint.

Removal & Installation

Front

1. Before servicing the vehicle, refer to the precautions section.
2. Remove or disconnect the following:
   
   
   Halfshaft nut

   Front wheels

   Hex bolt for outer joint of drive axle

   Anti-lock Brake System (ABS) speed sensor by sliding it partly out of its mount

   Halfshaft from the transaxle flange
3. Press the halfshaft upward toward the front of the vehicle.
4. Turn the steering to full lock.
5. Remove the halfshaft.

To install:

NOTE

If equipped, replace the inner CV-joint gasket.

Halfshaft into the wheel hub

Halfshaft-to-transaxle flange. Torque the bolts to 33 ft. lbs. (45 Nm) for the M8 bolts and to 59 ft. lbs. (80 Nm) for the M10 bolts

ABS speed sensor

Halfshaft nut. Torque it to 148 ft. lbs. (200 Nm) plus an additional ¹ / ₄ (90 degree) turn

Hex bolt for outer joint of drive axle. Torque M14 bolts to 85 ft. lbs. (115 Nm) and M16 bolts to (190 Nm).

Front wheels

1. Before servicing the vehicle, refer to the precautions section.
2. Remove or disconnect the following: 
   
   
   Hub cap or center cap

   Hex collar bolt by loosening it

   Front wheels

   Halfshaft-to-transaxle flange bolts

   Hex collar bolt

   Anti-lock Brake System (ABS) wheel speed sensor cable from the brake caliper bracket

   ABS speed sensor by sliding it partly out of its mount 
   
   

    

   Fig. Loosen nut (1), remove the hex bolt and pull both arms (2) upward and out-A4 models
   
   
   
   
   Remove nut/bolt No. 1, as shown
3. Pull both arms up and out of the swing arm
   
   WARNING

   The slots in the swing arm must not be widened. Do not loosen the bolts No. 3 and 4, otherwise the axle geometry must be checked.
4. Tilt the swing arm out and to the rear of the vehicle
5. Remove the halfshaft

To install:

1. Install or connect the following:
   
   
   Halfshaft into the wheel hub

   Swing arm bolt. Torque it to 30 ft. lbs. (40 Nm)

   Halfshaft-to-transaxle flange. Torque the bolts to 30 ft. lbs. (40 Nm) for the M8 bolts and to 57 ft. lbs. (77 Nm) for the M10 bolts

   ABS wheel speed sensor

   Sensor cable into the caliper bracket

   Front wheels
2. Tighten the axle bolt as follows:
   
   
   M14 bolt: 85 ft. lbs. (115 Nm) plus an additional ¹ / ₄ (90 degree) turn

   M16 bolt: 140 ft. lbs. (190 Nm) plus an additional ¹ / ₄ (90degree) turn

These details will help.

Thanks.

FOR MORE HELP GO TO: ---

Car repair guide?

http://technoanswers.blogspot.in/2012/03/car-repair-guide.html