Audi*Volkswagen*Porsche*BMW*Mercedes
Professionally Rebuilt Differentials, Sales & Service
Precision rebuild service
You send your differential in to have it professionally rebuilt
Roll the dice on a used differential…or have your original differential rebuilt for a comparable price.
Cayenne * Touareg * Q7
$799.99
The most common of rebuilds, these FRONT differentials all share the same part across platforms from 2003-2018. The change to a newer style in 2011 resulted in double roller bearings for the pinon and an overall smaller and weaker design. Regardless, both generations experience a common failure which starts with a whine or “hum” at 30-60mph. Skip changing the wheel bearings, they rarely fail. A full rebuild is required and oil changes with full synthetic 75W-90 every 30k miles is recommended.
Trust The Diffman to rebuild your factory differential to spec with the following parts.
Case fully cleaned & inspected. Spider, pinion and ring gears inspected.
New FAG Pinion bearings (2011-2018), Timken (2003-2010).
New Koyo carrier bearings (2011-2018), Timken (2003-2010).
VW pinion seal.
Coreteco axle Seals.
Pinion torqued to 8inlbs rotational torque (2011-2018), 15inlbs (2003-2010)
Case sealed with black RTV.
*New breather tube installed if required (add $35).
New needle bearing installed if required (very rare) (add $40).
Items not addressed:
Exterior filth and grime.
Bushings
BMW X-Drive
$629.99
The second most common of rebuilds, these FRONT differentials share the same internals from 2003-2016 and 2016-2019. In 2019.5, the internals were redesigned with…weaker…components.
Trust The Diffman to rebuild your factory BMW differential to spec with the following parts:
Case fully cleaned & inspected. Spider, pinion and ring gears inspected.
New Timken/Koyo carrier bearings.
New FAG/INA pinion bearings.
Factory ZF or BMW pinion and axle seal.
New output O-Ring.
Pinon torqued to 8inlbs rotational torque.
Case sealed with black RTV.
2019.5+ differentials are compatible externally but internally the bearings were downsized and down graded. Now using a single roller small pinion bearing and ZWZ Chinese carrier bearings, BMW really made a poor decision. European distributors are currently unable to locate these bearings aftermarket.
PLEASE SEE CUSTOM SERVICES IF YOU HAVE A 2019+ DIFFERENTIAL.
Rear Differentials
Starting at $599.99
The rear differential is responsible for most of the work in powering your car. These rarely fail. More robust bearings and a 50% increase in fluid capacity keeps things well lubed and running cooler.
That said, if you are experiencing a failure in the rear, please reach out. Obtaining parts usually requires a special call to my European distributors and can take anywhere from 1-2 weeks to obtain. Price starts at $599.99 but will likely be higher. No markup on parts here, they are just harder to obtain.
Custom Services
$TBD
Custom service is for a differential not listed. This could be for your Mercedes Benz, Audi, VW, or Porsche of any model. Parts are usually obtainable. All differentials operate the same, the rebuild process is the same, and parts will need to be ordered.
Transfer case rebuilds upon request.
Lockers installed upon request.