Audi Workshop Service and Repair Manuals

Overview of components

• Circlip
• Free wheel with -B1- piston
• Dished washer
• ◆ Installation position: Convex side faces toward free wheel
• Pressure plate
• ◆ Installation position: Flat side faces toward plates
• ◆ As a replacement part it is assigned to the gearbox code letters (different identifications)

• Inner plate -B1-
• ◆ Quantity => from Page 00-3
• Outer plate -B1-
• ◆ Quantity => from Page 00-3
• Shim
• ◆ 1 or 2 shims can be installed
• Gearbox housing
• ◆ With input gear and planet carrier installed

Special tools and workshop equipment required

• ◆ Press plate VW 402

→ Determining thickness of shim -B-

The thickness of the shim depends on the size of gap "x". Gap "x" is calculated using the following formula:

x = K + (l /2) - m

Calculating "l"

• ‒ Press piston into free wheel as far as stop.
• ‒ → Place straightedge -A- onto outer race of free wheel and hold in position -arrows-.
• ‒ Use depth gauge -B- to measure down to inner edge of piston.

Example:

Calculating "m"

• ‒ → Place straightedge "A" on thrust plate.
• ‒ Compress set of plates including pressure plate in direction of arrow and measure the thickness of plate set with depth gauge "B".

Example:

Example for calculating gap:

x = K + (l /2) - m

x = 30.5 + (3.6 / 2) - 29.0 = 3.3 mm

• ‒ Determine size of shim(s) according to table. Part numbers

=> Parts catalogue

Table of shims -B-

• ‒ After determining shim for -B1- carry out check measurement.

Reverse gear brake -B1- check measurement

• ‒ Install parts up to free wheel and secure with circlip
  => Assembling planetary gearbox, Page 37-113.
• ‒ → Use a feeler gauge -A- to measure play between the plates (accessible through gap next to valve body flange).

• ● Play: min. = 1.25 mm; max. = 1.55 mm.