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 4 ways:

• 4-pinion assembled at JXB
• 4-pinion DIY version for at-home assembly
  • requires 9/16-18 threaded slide hammer available for rental at most auto parts stores
• 4-pinion + pinion shaft rebuild assembled at JXB
• 4-pinion + pinion shaft rebuild DIY version for at-home assembly
  • requires 9/16-18 slide hammer and a hydraulic press

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 choose the at-home DIY version, you will also receive:

• Axle bearing tool kit (TLK01A0), including:
  • Case splitting wedge/block set
  • Outer axle seal remover tool
  • Outer axle seal installer tool
  • Inner axle seal remover/installer combination tool
  • Torque override axle shaft removal tool
  • Side bearing outer race removal tool
  • Side bearing outer race installer tool
• Spider gear pin removal tool
• 6mL Tube of Permatex Anaerobic gasket maker

If you add the pinion shaft rebuild service, we will also install:

• New pinion shaft oil seal
• 2 new pinion shaft bearings

If you choose the at-home DIY version with the pinion shaft rebuild kit, you will also receive:

• Pinion shaft rebuild toolkit (TLK02A0), including:
  • Pinion seal puller tool
  • Pinion seal installer tool
  • Pinion support stand for hydraulic press (needed to reinstall pinion shaft into casing)
  • Small pinion bearing puller tool
  • Small pinion bearing race removal tool
  • Small pinion bearing race installer tool including slide hammer extension
  • Large pinion bearing race removal tool
  • Large pinion bearing race installer tool

We recommend confirming on your vehicle the exact differential code. They are found in a number of places:

DIF06A0 - for codes MKX/MKY/MKU - DIY version

DIF06A0-A - for codes MKX/MKY/MKU - Assembled at JXB

DIF06A0-P - for codes MKX/MKY/MKU - DIY version with pinion shaft rebuild kit

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 - for code MKV - DIY version

DIF06A1-A-P - for code MKV - Assembled at JXB with pinion shaft rebuild service

DIF06A1-P - for code MKV - DIY version with pinion shaft rebuild kit

Feel free to contact us at info@mlperformance.co.uk should you wish to double check!

To ensure the part(s) you have ordered fits your vehicle, we run a compatibility check prior to dispatch. We can do this either using your registration number (UK) or the last 7 digits of your VIN. Simply enter your car details prior to checkout.

JXB-DIF06A1

Manufactured by

JXB Performance