Differential Rebuilds & Upgrades

Differential upgrade and rebuild services. Built to order. All are fitted with new bearings and seals. These are blueprinted and guaranteed to be within OEM specifications. Diff Lab's target blueprint specifications are much narrower than BMW's specifications, so you can be assured you're getting the best build every time. Builds can take 1-3 days. If the job is urgent, please let us know. Some Motorsport gears can have ~10 days lead time, though many common Motorsport gear sets are stocked.

We specialise in OS Giken, MFactory and Wavetrac torque biasing and limited slip differentials. Diff Lab is OS Giken Australia, the sole authorised Australian distributor for OS Giken, Japan. We can provide custom setup and the best pricing on OS Giken.

It will be assembled for you and delivered. All differentials are exchange units. An exchange differential must be returned to Diff Lab within seven (7) days of receiving your new differential. A core charge is needed, and is refunded after your differential has been returned. Core charges are paid by EFT regardless of whether Paypal was used at checkout. Core charges are refunded by EFT.