39 08 15 Adjusting drive set -GT3 · Adjusting crown wheel 7. Secure the universaldial gauge h

911 Carrera (996) Final drive -Differential, differential lock 39 08 15 Adjusting drive set -GT3 Adjusting crown wheel 7. Secure the universaldial gauge holder VW 387 with dial gauge and extensionon theDeterminethe total disc thickness "$ tot." housingand set it to "0" with 2 mm preload.($1 + $2). Readjustmentof the crown wheel is necessary if: the transmission housing,side transmission cover, taper roller bearingsfor the differential, differential housingor gear set is replaced. Note The pinion shaft must be removed in order to determinethe preload of the tapered roller bearingson the differential. 1. Make sure that the bearing outer races of the tapered roller bearingsare firmly seated in the 365_99 transmissionhousingor in the side trans- mission cover. A = Dial gauge extension (approx. 30...40 mm long) 2. Fit one 2.5 mm thick spacer ring each on the B = Finaldimensionplate VW 385/17 crown wheel side and the opposite side of the differentialto be used. 8. Movethe differentialup and down with special tool VW 521/4. Read and make a note of the 3. Fit special tool VW 521/4 opposite the play indicatedon the dial gauge. crown wheel (S2 side) in the differential housing. Note Do not turn the differentialwhen measuringthe 4. Fit differential into the transmission housing play, otherwisethe measurementresult will be and turn it through several revolutions. falsified. 5. Install the side transmissioncover without 9. Calculate"S tot.". sealing ring and tighten all hexagon-headbolts "S tot," = Shim thickness used to 25 Nm (19 ftlb.). + Measurementresult + Compressionof the tapered 6. Placethe finaldimensionplateVW 385/17 roller bearings ontothe collar of the differential. 39 08 15 Adjusting drive set -GT3 39 -227 Printed in Germany -29, 1999 GT339227