Wavetrac Differential Made in USA. Fits HAG215 rear axle Mercedes:
AMG E55/E63 W211 & E63 W212
AMG C63 W204
AMG C55 W203
AMG SL55 SL65 R230
AMG CLS63
SL600 R230
AMG CLK63 CLK55 '04+ W209 CLK500 '04+ W209
AMG SLK55 R171
 
OEM replacement bearing info: Timken part numbers RACE NP120839 (NP957403) & BEARING NP335170 (NP604623). Differential ring gear bolt (mbz # 0049904112) torque specs 75ft lbs.
 
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.