Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSAUDI1998A4 AVANT QUATTRO, AUTOMATICREPAIR AND DIAGNOSISTRANSMISSIONAUTOMATIC TRANSOVERHAUL - 01VFINAL DRIVE, DIFFERENTIALDRIVE PINION & RING GEAR, ADJUSTINGGENERAL NOTESNOTES
1998 Audi A4 Avant Quattro, Automatic
General Notes: Notes
1998 Audi A4 Avant Quattro, AutomaticSECTION Notes
- Drive pinion and ring gear must be very carefully adjusted to ensure long service life and smooth running. At the factory, drive pinion and ring gear are adjusted relative to each other to ensure smooth running and low noise in both directions. The location for the smoothest running is determined by moving drive pinion axially whereby ring gear is moved far enough out of the backlash-free position so that the backlash is within specified tolerances.
- The goal of the adjustment is to reproduce the setting for the quietest possible running, as obtained on the test machine during production.
- The deviation, or tolerance "r" which is based on the master gauge "R0" is measured for the final drive sets supplied as replacement parts and marked on the outer circumference of the ring gear. Every drive pinion set - drive pinion and ring gear - may only be replaced together.
- Follow general repair notes for tapered roller bearings and shims.
- Make sure that all installation and measurement procedures are performed with the utmost care and cleanliness to ensure a successful result.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.