Determining shim "S4" thickness when renewing gearbox cover — VW

🧭 Before you start

Fits: VW Passat B5 (3B)

• Special tools named: dial gauge

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• Allocate shims using Electronic parts catalogue (ETKA).
• If the dial gauge reading is more than 1.00 mm, S4 shim must be reduced in thickness by the value "x".

📋 Procedure

1. Clean housing flange.
2. Insert pinion shaft in gearbox cover.
3. Turn pinion shaft 8 turns by hand so that tapered roller bearing settles.
4. Set up measuring tools.
5. Set dial gauge (3 mm range) to zero with 1 mm preload.

6. Remove bracketVW 387 complete with dial gauge.
7. Remove pinion shaft and tapered roller bearing outer race with pressure plate, shim and disc and install in new gearbox cover .
8. Fit measuring tools to new gearbox cover.
9. Note reading on dial gauge. [Note: Allocate shims using Electronic parts catalogue.]
10. If the dial gauge reading is more than 1.00 mm, S4 shim must be reduced in thickness by the value "x".
11. Fit gearbox cover and check preload of pinion shaft tapered roller bearing .

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