Eaton - 912A579
 
Fits: AMC 20 Rear Ends 
 
Detroit Truetrac® Differential; 29 Spline; 1.27 in. Axle Shaft Diameter; 3.08 And Up Ring Gear Pinion Ratio; Rear AMC 20;
 
The Detroit Truetrac was the first helical gear differential ever introduced into the automotive aftermarket as an Eaton brand. It remains the leading helical gear-type limited slip differential in the industry. Detroit Truetrac's proven helical gear design eliminates the need for wearable parts, resulting in maintenance free traction recognized not only for its toughness, but its smooth and quiet operation as well.Proven design, low cost and effective performance all make the Detroit Truetrac limited slip differential the ideal choice for a wide variety of vehicle applications. No maintenance - Just Traction.
 
*Helical Gear Limited Slip Differential
*Optimized Torque Bias Ratios Deliver Max Acceleration And Handling
*Automatic Engagement
*Works In Forward And Reverse
*Ideal For Most Vehicles
*Durable; Smooth; Quiet Operation