Final drive gear set, adjustment and marking

WARNING: This page is about a different car, the 2008 Audi A4, 2007 Audi A4, 2006 Audi A4, and 2005 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Final Drive Gear Set, Adjustment And Marking

Courtesy of VOLKSWAGEN UNITED STATES, INC.

1 - "30083" number of matched pair of gears

In some cases identification number of matched pair only has four digits

2 - Deviation (tolerance) "r" is based on the master gauge used on the test machine in production. The dimension "r" is always given in 1/100mm. For example: "25" indicates r = 0.25 mm

Ro - Length of test machine master gauge

Ro - Ring gear diameter 182 mm = 59.65 mm

R - Actual distance between ring gear axis and face of pinion shaft in position of quietest running for this gear set.

Vo - Hypoid offset