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The most common failure point on the Audi Sport Differential is the pair of spider gears at the heart of the differential. These gears take 100% of the torque delivered to the rear end. On higher powered and/or heavier cars, it’s common to see them break during launches and 1-2 shifts, usually destroying the casing and ring/pinion gears in the process. Photos below. The 4-pinion upgrade replaces the stock differential with a stronger unit utilizing 4 spider gears instead of 2.
The 4-pinion upgrade is offered in 2 ways:
4-pinion assembled at JXB
4-pinion + pinion shaft rebuild assembled at JXB
4-pinion upgrade service includes:
Split-housing 4-pinion differential casing with new taper roller bearings
2 additional OEM spider gears
2 new outer axle oil seals
4 new inner axle oil seals
New pump motor assembly gasket
If you add the pinion shaft rebuild service, we will also install:
New pinion shaft oil seal
2 new pinion shaft bearings
We recommend confirming on your vehicle the exact differential code. They are found in a number of places:
Stamped into the bottom of the Sport Differential, driver side.
The build label on the “Warranty Voucher” page of the Warranty and Maintenance Manual.
Careful!!! MKV, MKY, and MKU all look very similar.
The build label in the trunk.
Breakdown of the 3 codes shown on the build label.
DIF06A0-A - for codes MKX/MKY/MKU - Assembled at JXB
DIF06A0-A-P - for codes MKX/MKY/MKU - Assembled at JXB with pinion shaft rebuild service
DIF06A1-A - for code MKV - Assembled at JXB
DIF06A1-A-P - for code MKV - Assembled at JXB with pinion shaft rebuild service
