Shim "S4", re-determining when replacing transmission cover
WARNING: This page is about a different car, the 2004 Audi A4, 2003 Audi A4, and 2002 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.
Special tools, testers and other items required
- 2 x centering disc VW 385/3
- Measuring plate VW 385/17
- Universal dial indicator holder VW 387
- Assembly device VW 792
- Dial indicator
- Dial indicator extension
- Depth caliper gauge with minimum measuring accuracy of 5/100 mm
- Clean joint surfaces of cover.
- Measure difference in depth "a" on old and new transmission covers.
Example:
| Depth "a" of old transmission cover | 257.40 mm | |
| Depth "a" of new transmission cover | 257.55 mm | |
| = | Difference | 0.15 mm |
- Install thicker shim "S4" if new transmission cover is deeper.
- Install thinner shim "S4" if old transmission cover is deeper.
Example:
| Old shim "S4" | 0.95 mm | |
| + | Difference | 0.15 mm |
| = | New shim "S4" | 1.10 mm |
Available shims. Refer to Available shims for "S4" .
- Insert outer race for tapered roller bearing together with shim "S4" in transmission cover. See Pressing in outer race for tapered roller bearing
- Re-insert fully assembled pinion in transmission housing.
- Install transmission cover and tighten bolts to 22 Nm.
- Rotate pinion in same direction and in opposite direction to hollow shaft 5 turns in both directions, so that tapered roller bearings slip into place.
- Install measuring tools and secure with bolt (arrow) to transmission cover.
- Set dial indicator (3 mm measuring range) to "0" with 2 mm pre-load.
- Loosen bolts of transmission cover and turn pinion freely.
If correct shims were selected, the dial indicator should show the following value:
- 0.05 to 0.15 mm
If this value is not obtained, the setting must be corrected.