Audi Workshop Service and Repair Manuals

Adjusting 2nd and 4th gear brake “B2” on gearboxes with shim and retaining ring   Note t  Gearbox code letters → Chapter. t  With these gearboxes, the thickness of the shim → Item determines the clearance of brake “B2”. t  Adjustment instructions for gearboxes with corrugated washer → Chapter. Special tools and workshop equipment required

t  Setting tool -3459-

t  Depth gauge -VAS 6082- Procedure –  To adjust, fit components without shim → Item, without last outer plate → Item and without spring caps → Item.

Determining thickness of shim(s) The thickness of the shim is governed by gap dimension “x”. This gap dimension is calculated according to the following formula:    -x- = -a- – -b- – 2.65 mm x -  Gap dimension a -  Installation position of 2nd and 4th gear brake “B2”; determining value → Anchor b -  Size of ATF pump housing; determining value → Anchor   Note t  The illustration shows a sectional view of the assembled brake “B2”. Setting tool -3459- for exerting force -F- on clutch pack is not shown. t  The value “2.65 mm” takes into account the amount of settling force -F- exerted by setting tool -3459-. t  The first outer plate -arrow- is 3 mm thick. 1 -  ATF pump 2 -  Retaining ring 3 -  Plates of “B2” without last outer plate 4 -  Supporting tube   Note The last outer plate must not be fitted when measuring.

Determining value “a” –  Assemble planetary gearbox as far as last inner plate for “B2” → Chapter.   Note The last outer plate and the shim are not installed. –  Fit retaining ring with smooth side on last inner plate. –  Apply setting tool -3459- to retaining ring and turn so that the 3 clips align with the 3 holes for the ATF pump. –  Bolt setting tool -3459- to flange for ATF pump: tightening torque 5 Nm.   Note The clutch pack for “B2” is now pressed together for the measurements.

–  Use depth gauge -VAS 6082- to measure from pump flange/gearbox housing -arrow- to setting tool -3459-.

l  Example of value “a”:
Height of setting tool -3459-	60.0 mm
– Measured value	– 32.3 mm
= Determined value “a”	27.3 mm

–  Detach setting tool -3459-. –  Remove retaining ring.

Determining value “b” –  Push piston into ATF pump onto stop. –  Fit paper gasket onto ATF Pump. –  Place straightedge -B- on stator support -arrows- and use depth gauge -VAS 6082--item A- to measure down to paper gasket on flange of pump.

l  Example of value “b”:
Measured value	39.8 mm
– Straightedge	– 19.5 mm
= Determined value “b”	20.3 mm

l  Example for calculating gap “x”:    x = a – b – 2.65 mm l  x = 27.3 – 20.3 – 2.65 mm = 4.35 mm –  Determine shim(s) according to following table: for part numbers refer to → Electronic parts catalogue:

Gap “x” (mm)	Shim(s) in mm
3.25 … 3.50	1.0
3.51 … 3.75	1.25
3.76 … 4.00	1.50
4.01 … 4.25	1.75
4.26 … 4.50	1.00 + 1.00
4.51 … 4.75	1.00 + 1.25
4.76 … 5.00	1.25 + 1.25
5.01 … 5.25	1.25 + 1.50
5.26 … 5.50	1.50 + 1.50
5.51 … 5.75	1.50 + 1.75
5.76 … 6.00	1.75 + 1.75

–  Fit three spring caps on compression springs. –  Fit last outer plate with a thickness of “3 mm”.

–  Install correct shim(s) -a-. –  Fit retaining ring -b- on shim(s). l  Installation position: smooth side faces shim. –  Further procedure → Anchor.