Wavetrac Differentials: Modern Engineering for Superior Performance

Designed from a clean sheet, the new Wavetrac Differential brings current gear technology to the market. Internally, its gear tooth forms are optimized for strength and improved oil film retention over competitive designs. Our gear package is smaller, reducing overall mass, yet more durable. Attention was also paid to the side gear/axle interface, putting as much material thickness as possible in this critical area - most important when power levels get high.

Wavetrac differentials are state-of-the-art helical gear differentials designed, developed, and manufactured in the USA by Autotech Driveline. The Wavetrac Differential is the only torque biasing differential on the market with patented technology that mitigates wheelspin when an unloaded wheel condition arises. During zero axle load conditions, the Wavetrac cam device acts to create internal load, maintaining drive on the gripping wheel instead of acting like an open diff (and going nowhere!).

Each Wavetrac Differential is crafted from the highest quality materials available. The internal gears are made from high strength 9310 alloy steel. The diff bodies are machined from case-hardened steel billet. To complete the package, every Wavetrac differential is built exclusively using high quality, high strength fasteners from ARP, the world leader in fasteners.

All Wavetrac differentials include a transferable, Limited Lifetime Warranty.

Mods to OEM stub shafts required. C6 Z06 requires one (1) bearing Timken #387A-382-S, not included

Stub Shaft mods click here

Fits BMW 188K Axle with final drive ratio over 3.15

E46 325i, 328i, 330i A/T 1998-2005. Bolt on Ring gear

E9X 325i, 328i, 330i 2006>.  Some Ring gears could be welded

E9X 335i A/T 9/2007>. Some Ring gears could be welded

E8X 135i A/T 2008>. Some Ring gears could be welded

E8X 128i 2008>. Some Ring gears could be welded

E60 525i, 528i, 530i A/T. Some Ring gears could be welded

E8X Z4 2.5i, 3.0i. Some Ring gears could be welded

All welded OEM gear assemblies require machinework and Installation Kits sold separately. See special notes about these applications

Wavetrac diffs are state-of-the-art helical gear differentials designed, developed, and manufactured in the USA by Autotech Driveline. The Wavetrac Differential is the only torque biasing differential on the market with patented technology that mitigates wheelspin when an unloaded wheel condition arises. During zero axle load conditions, the Wavetrac cam device acts to create internal load, maintaining drive on the gripping wheel instead of acting like an open diff (and going nowhere!). Super strong 9310 alloy steel gears are enclosed in case-hardened steel bodies, held together with ARP fasteners. All Wavetrac differentials include a transferable, Limited Lifetime Warranty.

Fits Welded Ring Gear BMW 215K Axle for FD ratios 2.35 - 2.81

E87/E92 135i/335is DCT

F10 550i

E90 335D

E89 Z4 35i DCT 

All welded OEM gear assemblies require machinework and Installation Kits sold separately. See special notes about these applications

The Wavetrac Differential is the only torque biasing differential on the market with patented technology that mitigates wheelspin when an unloaded wheel condition arises. During zero axle load conditions, the Wavetrac cam device acts to create internal load, maintaining drive on the gripping wheel instead of acting like an open diff (and going nowhere!). Super strong 9310 alloy steel gears are enclosed in case-hardened steel bodies, held together with ARP fasteners. All Wavetrac differentials include a transferable, Limited Lifetime Warranty.

Torque ring gear bolts to 85ft lbs

Some BMW models have the factory ring gear welded to the factory differential (aka center section). This kit includes labor to machine the ring gear and an ARP ring gear bolt kit. Your stock rear end would need to be sent to us for machining service. Please drain the gear oil and remove drive flanges before shipping. Once the ring gear is machined we install the Wavetrac differential (sold separately) into the rear end with proper backlash specifications.

Lead time for machining service 4 weeks.

Autotech has made it easy to install your new 02J-B Wavetrac differential.

Using ARP's superlative bolt kit as the basis, we have sourced the necessary end cover gasket, carrier bearings, speedometer drive gear and o-rings from Volkswagen required for a successful installation. Save time and money!

MK5-MK7 5-speed VW 02J-B, 02S 2004+

Kit contents:

2 OEM differential carrier bearings/races
1 OEM VW Speedometer drive gear
1 OEM VW 5th gear end cover gasket
4 OEM VW selector shaft o-rings
4 OEM VW pinion shaft support o-rings

Includes ARP Ring Gear Bolt Kit!

Wavetrac Differential 02J-B MK4 '04+ 5spd and MK5 2.5L 5cyl 5spd manual. Also 5 speed manual MK6 & MK7. 02S 6 speed.

The 180WK 02J will fit until 2004 will have a 114mm ring gear inner diameter
The 181WK 02JB's after 2004 will have a 113mm ring gear inner diameter

Designed from a clean sheet, the new Wavetrac Differential brings current gear technology to the market. Internally, its gear tooth forms are optimized for strength and improved oil film retention over competitive designs. Our gear package is smaller, reducing overall mass, yet is more durable. Attention was also paid to the side gear/axle interface, putting as much material thickness as possible in this critical area - most important when power levels get high. Each Wavetrac Differential is crafted from the highest quality materials available. The internal gears are made from high strength 9310 alloy steel. The diff bodies are machined from case hardened steel billet. To complete the package, every Wavetrac differential is built exclusively using high quality, high strength fasteners from ARP, the world leader in fastener technology.

Torque supplied ring gear bolts to 90ft. lbs