Yukon Dura Grip Limited Slip Differential for GM 55P Dropout, 3.73 & Down Ratio, 17-Spl

The Yukon Dura Grip provides aggressive yet smooth traction to give you the confidence & performance you need. Get longer life and better traction with the heavy duty Yukon Dura Grip Positraction. The Yukon Dura Grip uses a nodular case and forged 4320 internals for added strength along with composite clutches for high performance and long life. All units are Rebuildable and many offer upgrades to increase aggressiveness for racing applications. Each unit carries a one year warranty against defects.

3.73 ratio and down only

GM

GM

A factory thin ring gear was used on 1955-1956 carriers with ribs on the back of the ring gear side. The ’55-’56 open dropout casting numbers end with ‘306’. A new ring and pinion or ring gear spacer is required when replacing the factory 4 series case.