Setting circumferential backlash · Note 7. Fit the universaldial gauge holder

911 Carrera (996) Final drive -Differential, differential lock Setting circumferential backlash Note 7. Fit the universaldial gauge holder with flat extensionso that a right angle is producedThe backlashto be set is inscribed on the edge betweenthe dial gauge axis and the lever.of the crown wheel. 1. Fit the gear set with the adjusting shims determinedduring adjustmentof the pinion shaft. Note :~=-;:J. Alwaystighten the collar nut of the drive pinion to 300 Nm (222 ftlb.) before carrying out the measurement. VW382/10 2. Fit the differentialwith tapered roller bearings VW 387 and the determined spacer rings (51 + 52) into the housing. ~ Dimension"a" = 91 mm 366_99 3. Put on the side transmissioncover and tighten all hexagon-headbolts to 25 Nm (19 ftlb). 8. Carefullyturn the crown wheel as far as it will go via the clamping screw of the adjustment Note device and set the dial gauge to zero. Next, Alwaysmake sure a certain amount of backlash turn the crown wheel back and read off the is presentwhen tightening the screws. The drive circumferentialbacklash. Note the value. pinion must not jam under any circumstances. 4. Screw measuringlever VW 388 together with the adjusting device VW 521/4 and set the lever length to 91 mm using the gauge plunger. See dimension"a" in the illustration. 5. Insertthe adjusting device with clamping sleeve (special tool 9145) into the differential and clamp it securely. 6. Turn the differential several times in both directions so that the tapered roller bearings can settle. 3908 15 Adjusting drive set -GT3 39 -229 Printed in Germany -29, 1999 GT339227