Chevrolet Limited Slip Differential Assembly - Rear

Limited Slip Unit YDGGM55P-17-1 A factory thin ring gear was used on 1955-1956 carriers with ribs on the back of the ring gear side. The 1955-1956 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. Yukon recommends the use of high grade Non-Synthetic GL-5 gear oil and Yukon LSD (Limited Slip Differential) additive for long life and smooth operation. Part number OILADD. The use of synthetic oil is not recommended and may result in aggressive or noisy operation. ,17SPL,3.73&,55P,CAR,CLUTCH,COMPOSITE,DOWN,DURAGRIP,GM,GM55P-POSI,PASSENGER,POSITRACTION,YDG, 55P GM 3.73 & down Yukon Dura Grip Limited Slip, 17spl; Composite Clutches 55P GM 17SPL 3.73& DOWN DURAGRIP POSITRACTION, COMPOSITE CLUTCH 55P GM 3.73 & down Yukon Dura Grip Limited Slip, 17 Spline; Positraction; Composite Clutches Yukon Dura Grip is a positraction limited slip differential that provides smooth yet aggressive traction, giving you the confidence and performance you need across a wide variety of terrains. The Dura Grip is engineered for long life and is completely rebuildable. Dura Grips are constructed with a high strength nodular case, forged 4320 chromoly spider gears, and composite clutches. For unmatched positraction performance, the Dura Grip is the ultimate choice. When your vehicle demands performance, durability and strength, choose Yukon Dura Grip. Fits 3.73 Gear Ratio & Down (Also Fits Thick Gears) Fits 55P GM with 17 Spline Axles Fully rebuildable design and proudly assembled in the USA Limited Slip Differential with Composite Clutches All units are backed by extensive product testing and state-of-the-art software design Yukon Dura Grips feature 4320 chromoly spider gears for ultimate durability Gears are cut to provide the strongest teeth possible in any terrain