Wavetrac Install Kit For F22 228I/F3X 328I, 428I MT R=3.91 30.309.185Wk - 30.309.185WK

• Unlike other gear driven diffs, when unloading a wheel, only the Wavetrac will still put power to the other wheel
• Lifetime warranty (even transferrable), made in USA
• Works on acceleration and deceleration (most if not all other gear driven diffs only operate on acceleration)
• Non-intrusive, won’t be ‘fighting the steering wheel’ in low speeds/tight turns compared to a spool/clutch type diffs
• Maintenance free, no parts to replace or oil to constantly change
• Super durable (beefed up gear/housing interface, billet steel housings, 9310 alloy steel internal gears)
• Direct replacement for factory diff
• ARP fasteners
• Constantly biases power to drive wheels seamlessly in between acceleration and deceleration, and with no delay
• Smaller gear package to reduce mass, yet higher tooth strength to increase durability
• Innovative wave design of preload hubs/gear interface means will work in zero load or near-zero load conditions (unlike Torsen or other gear driven diffs)
• Works with existing traction control/ABS electronic systems seamlessly

Autotech Driveline warrants each new Wavetrac® Differential against defects in manufacture, material, workmanship, and wear-out when used in the vehicle application for which it was originally designed, on any motor vehicle, under any and all operating conditions, including racing, for as long as the original purchaser or any subsequent purchaser owns the differential. 

The registrant must present a copy of this warranty together with a copy of the original receipt to the service outlet or parts store from whom the differential was originally purchased when making a claim for replacement or repair. All warranty claims submitted must include proof of purchase.

Failure to provide proper documentation renders warranty null and void. 

Exclusion from Warranty Coverage: The warranty does not apply to any Wavetrac® Differential which (a) has been improperly installed, installed in vehicles for which it was not designated, (b) has been modified or altered by the actual user or dealer or distributor, (c) has been improperly assembled by the purchaser or his agent, (d) has been operated in Shockproof® oil, or (e) was not sold by Autotech Driveline or through an authorized Autotech Driveline dealer or distributor.

Autotech Driveline's Obligation: Autotech Driveline's obligation under this warranty is limited to replacement or repair of the defective or worn-out differential at its sole discretion. Autotech Driveline has no obligation to bear any labor or other costs of return, removal and/or installation and will not be liable for any special, incidental, or consequential damages, including loss of use of the vehicle. Some states do not allow the exclusion of limited or incidental or consequential damages, so the above limitation may not apply to you.

Warranty Claim Procedures: Contact Autotech Driveline at 29 Journey, Aliso Viejo, CA 92656-3333 USA tel (949) 362-8700 for specific instructions.

Rights of Purchaser: This warranty gives you specific legal rights, and you may also have other rights, which vary from state to state.

Download a copy of the warranty here

This part also goes by the following cross reference.

Cross Reference Part Number:

This part fits 2 vehicles —