Fits VW Mk4 5 speed manual (bolt in axle flanges):
MK4 GTI/Golf/Jetta/Beetle 2.0L/12V VR6/TDI/1.8/1.8T/V5
MK3 Jetta TDI 5-speed
The 180WK 02J will fit until 2004 (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.