Gearbox removal & installation: Re-determining shim "„S"4“ when renewing bearing housing — AUDI

🧭 Before you start

Fits: Audi A4 Cabriolet B6/B7 (8H), Audi A4 B6/B7 (8E)

• Special tools named: T40100, VAS 6087, dial gauge

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• Apply 30 mm dial gauge extension(A) to rib in gearbox cover.

🔩 Torque settings

Values can differ between engine variants — check the code stamped on your block.

ℹ️ Always cross-check the exact figure against your vehicle's factory manual before final tightening — a wrong torque can damage the engine. These values are extracted from workshop data and may not cover every variant or revision.

📋 Procedure

1. Clean housing flanges.
2. Place straightedge (e.g. T40100, 39.70 mm wide) (1) on housing flange.
3. Measure difference between depth (a) on old and new bearing housing with a digital depth gauge (e.g. VAS 6087).
4. If new bearing housing is deeper, install a thicker "„S"4“ shim.
5. If previous bearing housing is deeper, install a thinner "„S"4“ shim.

6. Press tapered roller bearing outer race with shim "„S"4“ into bearing housing .
7. Re-fit fully assembled pinion shaft with hollow shaft into gearbox housing.
8. Fit bearing housing and gearbox cover and tighten bolts to 35 Nm. — 35 Nm (26 lb-ft)
9. To settle the tapered roller bearings: rotate pinion shaft together with hollow shaft 5 turns in each direction, then rotate pinion shaft separately in relation to hollow shaft 5 turns in each direction.
10. Set up measuring tools using 30 mm dial gauge extension(A); place M12 nut between VW 792 and gearbox housing when securing bolt (arrow) to gearbox housing. [Note: Apply 30 mm dial gauge extension(A) to rib in gearbox cover.]
11. Set dial gauge (3 mm measuring range) to "„0“" with 1 mm preload.
12. Loosen gearbox cover bolts and turn pinion shaft several times.
13. If the correct shims have been selected the dial gauge will now indicate the following value:

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