Eaton Detroit Truetrac Differential 29 Spline 1.27in Axle Shaft Diameter 3.08 & Up Ratio Rear AMC 20 - 912A579

The Detroit Truetrac is a helical-gear style, limited-slip differential that maximizes wheel traction and enhances driving characteristics. Maintenance-free, it features smooth, automatic operation in forward and reverse. Its versatility makes Detroit Truetrac the ideal traction solution for almost any type of vehicle.

This Part Fits:

Year	Make	Model	Submodel
2006	Hummer	H1	Alpha
2003-2004	Hummer	H1	Base
2003-2009	Hummer	H2	Base
2008-2009	Hummer	H3	Alpha
2006-2009	Hummer	H3	Base
2009	Hummer	H3	Championship Series
2007-2009	Hummer	H3	X
1976-1986	Jeep	Cherokee	Base
1981-1982,1985-1986	Jeep	Cherokee	Chief
1985-1986	Jeep	Cherokee	Laredo
1983,1985-1986	Jeep	Cherokee	Pioneer
1976-1977	Jeep	Cherokee	S
1978-1980	Jeep	Cherokee	Wide Track
1983	Jeep	Cherokee	Wide Track Chief
1976-1983	Jeep	CJ5	Base
1977-1980	Jeep	CJ5	Golden Eagle
1980-1983	Jeep	CJ5	Laredo
1982-1983	Jeep	CJ5	Limited
1976-1983	Jeep	CJ5	Renegade
1976-1986	Jeep	CJ7	Base
1977-1979	Jeep	CJ7	Golden Eagle
1980	Jeep	CJ7	Golden Hawk
1980-1983,1985-1986	Jeep	CJ7	Laredo
1982-1983	Jeep	CJ7	Limited
1976-1986	Jeep	CJ7	Renegade
1984-1986	Jeep	Grand Wagoneer	Base
1984-1985	Jeep	Grand Wagoneer	Limited
1981-1985	Jeep	Scrambler	Base
1985	Jeep	Scrambler	Laredo
1985	Jeep	Scrambler	Renegade
1982-1983	Jeep	Scrambler	SL
1982-1984	Jeep	Scrambler	SR
1976-1982,1984-1986	Jeep	Wagoneer	Base
1982-1983	Jeep	Wagoneer	Brougham
1976	Jeep	Wagoneer	Custom
1979-1986	Jeep	Wagoneer	Limited

Please note image may vary from product. Also, some items are special order. If delivery time is a concern, please contact us prior to purchase. 

Fidanza Performance is excited to offer the go to name in differentials - Eaton!

Eaton produces a range of differentials designed to improve traction, handling, and vehicle stability across various applications, from heavy-duty trucks to performance cars and off-road vehicles. One of their most popular products is the Truetrac Limited-Slip Differential, which uses helical gears for smooth, maintenance-free performance. The Detroit Locker is a fully locking differential, providing 100% power to both wheels when necessary, making it ideal for off-road or high-performance use. The Posi Limited-Slip Differential uses a clutch-based system for better traction under acceleration, commonly found in muscle cars. Eaton also offers the ELocker, an electronically controlled locking differential that allows drivers to engage or disengage the lock at the push of a button, which is useful for off-roading. Additionally, the Helical Limited-Slip Differential works similarly to the Truetrac, offering smooth and quiet operation while providing additional traction when needed. Overall, Eaton's differentials are known for their engineering, reliability, and performance, suited for various driving needs.

Fidanza Performance, founded in 1997, is a leading US manufacturer of high-quality lightweight aluminum flywheels, precision adjustable cam gears, and high-performance clutches. With nearly 20 years in the automotive performance market, Fidanza is renowned for its expertise and respected globally, offering products for a wide range of vehicles, from European sports cars to modern muscle cars and imports. The company originated in racing, with founder Lou Fidanza's success in the SCCA leading to the creation of specialty parts like aluminum flywheels. Fidanza has since expanded its product line to include cam gears and performance clutches, gaining a loyal customer base and worldwide recognition. In 2023 Fidanza opened the SpeedParts4Less Marketplace which sells other manufacturers quality high performance parts!