A6 Quattro Sedan V6-2.7L Turbo (APB) (2000)
Note:
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Secure special tools VW 521/4 and VW 52118 on right of differential (transmission side) to lift differential.
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If the measurement has to be repeated, the differential must again be fumed 5 turns in each direction to settle the taper roller bearing.
Formula:
"Stotal" = "S2*" ~ measurement bearing preload
Example:
Inserted shim(s) "S2*" 1.20 mm
+ Measured value 0.62 mm
+ Bearing preload (constant) 0.25 mm
Total shim thickness "Stotal"
For "S1" + "S2" 2.07 mm
Determining thickness of shim "S1*"
Notes:
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The preliminary adjustment shim "S1*" will be replaced with the final shim "S1 " after determining the backlash.
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The total shim thickness "Stotal" remains unchanged.
Formula:
"S1*" = "Stotal" - "S2*"
Example:
Total shim thickness "Stotal" for "S1" + "S2" 2.07 mm
- Inserted shim(s)"S2*" 1.20 mm
= Thickness of shim "S1*" 0.87 mm
Measuring friction torque (check)
Notes:
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Differential tapered roller bearings are low friction bearings. Therefore the friction torque only has a limited use as a check. Correct adjustment is
only possible by determining the total shim thickness "Stotal."
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Do not additionally oil new taper roller bearings for friction torque measurement. The bearings have already been treated with a special oil by the
manufacturer.
Drive pinion removed
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Fit torque gauge 0-600 Ncm -A- onto differential.
B - Socket