Adjust drive pinion rearaxle drive

Note

The setting dimension "E" is given on the ring gear.

2. Set adjusting ring of measuring mandrel VW 385/1 to dimension "a".

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1 = Setting dimension "E"

1. Install complete gear set without "S3" shims and tighten all hexagon nuts for tensioning plate with 23 Nm (17 ft.lb.)

3. Assemble measuring mandrel with centering disk 9109, tapered-roller bearings, plunger VW 385/14 and dial-gauge extension VW 385/15.

4. Set measuring mandrel with adjuster 385/30 to adjusting dimension (60.95 mm in the example). Set dial gauge (3 mm measuring range) to 0 with 1 mm pretension.

911 Carrera 4 Differential, Transaxle System

5. Block input shaft with Special Tool 9253, 8. Pull second centering disk with spindle select 4th gear and screw Special Tool 9283 towards the outside until the measuring onto hollow shaft hand tight. mandrel can still just be turned by hand.

6. Apply final dimension plate 9281 to drive pinion head and insert measuring mandrel into transmission case. Dial-gauge extension located in the area of the final dimension plate.

Dial Gauge Extension

9. Turn measuring mandrel carefully until the dial-gauge extension is vertical to the facing edge of the drive-pinion head. At this point, the pointer of the dial gauge reaches max. deflection (reverse point), and the dial gauge must be read.

Note

The measured value always deviates from the set dimension clockwise (the smaller pointer on the dial gauge is between 1 and 2), i.e. if the dial gauge is set with 1 mm preload, the value deviating from 1 is taken as shim thickness "S3".

Example:

If the small pointer on the dial gauge indicates between 1 and 2 and the large pointer indicates 0.37 mm, then take 0.37 mm as being the shim thickness (with 1 mm gauge preload). Always round up or down to the nearest 0.05 mm. (e.g. 0.37 mm to 0.35 mm).

6. Apply final dimension plate 9281 to drive pinion head and insert measuring mandrel into transmission case. Dial-gauge extension located in the area of the final dimension plate.

7. Fit side transmission cover without O-ring and fasten cross-wise with 4 nuts.

Note

Do not use a hammer when fitting the side transmission cover (the magnet- fitted final dimension plate may fall). Settle cover in installation position by tightening the nuts uniformly.

10. After providing the necessary shims, check setting value "E" again. A deviation ± 0.03 mm is permissible.

911 Carrera 4 Differential, Transaxle System

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