{"product_id":"yukon-gear-dura-grip-positraction-for-55p-gm-w-17-spline-axles","title":"Yukon Gear Dura Grip Positraction For 55P GM w\/ 17 Spline Axles","description":"The Yukon 55P GM 3.73 and down Dura Grip Limited Slip, 17 Spline; Composite Clutches. (Part number YDGGM55P-17-1) 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.\n55P GM 3.73 \u0026amp; down Yukon Dura Grip Limited Slip, 17 Spline; Positraction; Composite Clutches\nA 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 306in. 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.\n\u003cul\u003e\n  \u003cli\u003eAll units are backed by extensive product testing and state-of-the-art software design\u003c\/li\u003e\n  \u003cli\u003eYukon Dura Grips feature 4320 chromoly spider gears for ultimate durability\u003c\/li\u003e\n  \u003cli\u003eGears are cut to provide the strongest teeth possible in any terrain\u003c\/li\u003e\n  \u003cli\u003eFully rebuildable design and proudly assembled in the USA\u003c\/li\u003e\n  \u003cli\u003eFits 3.73 Gear Ratio \u0026amp; Down (Also Fits Thick Gears)\u003c\/li\u003e\n  \u003cli\u003eLimited Slip Differential with Composite Clutches\u003c\/li\u003e\n  \u003cli\u003eFits 3.73 Gear Ratio Down [Also Fits Thick Gears]\u003c\/li\u003e\n  \u003cli\u003eLimited Slip Differential w\/Composite Clutches\u003c\/li\u003e\n  \u003cli\u003eFits 55P GM with 17 Spline Axles\u003c\/li\u003e\n  \u003cli\u003eFits 55P GM w\/17 Spline Axles\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\nFitment:\u003cbr\u003e\n1955 Chevrolet Bel Air Base\u003cbr\u003e\n1955 Chevrolet Bel Air Beauville\u003cbr\u003e\n1955 Chevrolet Bel Air Nomad\u003cbr\u003e\n1955 Chevrolet Corvette Base\u003cbr\u003e\n1955 Chevrolet Nomad Base\u003cbr\u003e\n1956 Chevrolet Bel Air Base\u003cbr\u003e\n1956 Chevrolet Bel Air Beauville\u003cbr\u003e\n1956 Chevrolet Bel Air Nomad\u003cbr\u003e\n1956 Chevrolet Corvette Base\u003cbr\u003e\n1956 Chevrolet Nomad Base\u003cbr\u003e\n1957 Chevrolet Bel Air Base\u003cbr\u003e\n1957 Chevrolet Bel Air Nomad\u003cbr\u003e\n1957 Chevrolet Corvette Base\u003cbr\u003e\n1957 Chevrolet Nomad Base\u003cbr\u003e\n1958 Chevrolet Bel Air Base\u003cbr\u003e\n1958 Chevrolet Biscayne Base\u003cbr\u003e\n1958 Chevrolet Corvette Base\u003cbr\u003e\n1958 Chevrolet Impala Base\u003cbr\u003e\n1958 Chevrolet Nomad Base\u003cbr\u003e\n1959 Chevrolet Bel Air Base\u003cbr\u003e\n1959 Chevrolet Biscayne Base\u003cbr\u003e\n1959 Chevrolet Corvette Base\u003cbr\u003e\n1959 Chevrolet Impala Base\u003cbr\u003e\n1959 Chevrolet Nomad Base\u003cbr\u003e\n1960 Chevrolet Bel Air Base\u003cbr\u003e\n1960 Chevrolet Biscayne Base\u003cbr\u003e\n1960 Chevrolet Biscayne Fleetmaster\u003cbr\u003e\n1960 Chevrolet Corvette Base\u003cbr\u003e\n1960 Chevrolet Impala Base\u003cbr\u003e\n1960 Chevrolet Nomad Base\u003cbr\u003e\n1961 Chevrolet Bel Air Base\u003cbr\u003e\n1961 Chevrolet Biscayne Base\u003cbr\u003e\n1961 Chevrolet Corvette Base\u003cbr\u003e\n1961 Chevrolet Impala Base\u003cbr\u003e\n1961 Chevrolet Nomad Base\u003cbr\u003e\n1962 Chevrolet Bel Air Base\u003cbr\u003e\n1962 Chevrolet Biscayne Base\u003cbr\u003e\n1962 Chevrolet Chevy II Base\u003cbr\u003e\n1962 Chevrolet Chevy II Nova\u003cbr\u003e\n1962 Chevrolet Corvette Base\u003cbr\u003e\n1962 Chevrolet Impala Base\u003cbr\u003e\n1963 Chevrolet Bel Air Base\u003cbr\u003e\n1963 Chevrolet Biscayne Base\u003cbr\u003e\n1963 Chevrolet Chevy II Base\u003cbr\u003e\n1963 Chevrolet Chevy II Nova\u003cbr\u003e\n1963 Chevrolet Corvette Base\u003cbr\u003e\n1963 Chevrolet Impala Base\u003cbr\u003e\n1964 Chevrolet Bel Air Base\u003cbr\u003e\n1964 Chevrolet Biscayne Base\u003cbr\u003e\n1964 Chevrolet Chevy II Base\u003cbr\u003e\n1964 Chevrolet Chevy II Nova\u003cbr\u003e\n1964 Chevrolet Chevy II Nova SS\u003cbr\u003e\n1964 Chevrolet Corvette Base\u003cbr\u003e\n1964 Chevrolet Impala Base\u003cbr\u003e\n1964 Chevrolet Impala SS\u003cbr\u003e\n1964 Chevrolet Malibu Base\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; 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