Adjusting backlash
WARNING: This page does not describe the selected car, but rather 17 other vehicles, including the 2009 Audi S4, 2009 Audi A4, 2008 Audi S4, 2008 Audi RS 4, and 2008 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.
- Drive pinion with shim "S3" installed
- Differential with shims "S1*" + "S2*" installed
- Insert differential into final housing mount cover and tighten all bolts to 25 Nm.
- Turn differential 5 turns in both directions so that the taper roller bearings settle.
- Install measuring tools.
- Use dial indicator extension VW 382/10 (6 mm flat).
- Set measuring lever VW 388 to dimension "a" = 60 mm.
- Measure play between teeth flanks (backlash) as follows:
- Turn ring gear until it makes contact with a tooth flank (end of backlash travel).
- Preload dial indicator to 1 mm and set to zero.
- Turn ring gear back until lying against an opposite tooth flank (backlash).
- Read off backlash and note value.
- Turn ring gear through 90° and repeat measurements a further 3 times.