Replacement
1. Remove the final drive and clamp it in a vice.
2. Measure the bearing tension of the pinion gear. To do this, put a wrench on the pinion gear nut and measure the torque at which the pinion gear starts to move. It should be approximately 90–120 N·m.
3. Mark the position of the drive flange mounting nut and unscrew it, counting the number of turns. Remove the flange.
4. Replace the seal, reinstall the flange and tighten the fastening nut to the calculated number of turns.
(Original source is on the website: OpelBook.ru)
5. Adjust the tension of the pinion bearing by tightening the flange mounting nut.
6. Install the final drive into place.

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