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Detroit Truetrac Differentials


Detroit Locker
Detroit Truetrac Differentials

Detroit Truetrac was the first helical gear differential ever introduced into the automotive aftermarket. It remains the leading helical gear-type limited-slip differential in the industry. Its proven helical gear design eliminates the need for wearable parts, resulting in maintenance free traction. Recognized not only for its durability but also it's smooth and quiet operation.

Power transfer is so smooth; it literally goes unnoticed by the driver. Engineered to work efficiently in front and rear axles. No maintenance - Just Traction!



AMC 20
Detroit Locker 912A549 - Detroit Truetrac Differentials
357-912A549 AMC 20 IFS Truetrac Differential
  • 29-Spline Axles
  • 8.875" Diameter Ring Gear
  • Fits 2.73 & Down Gear Ratios
  • $696.99
    Detroit Locker 912A573 - Detroit Truetrac Differentials
    357-912A573 06/1976-86 AMC 20 Truetrac Differential
  • 29-Spline Axles
  • 8.875" Diameter Ring Gear
  • Fits 2.73 & Down Gear Ratios
  • $509.99
    Detroit Locker 912A579 - Detroit Truetrac Differentials
    357-912A579 To 1998 AMC 20 IRS Truetrac Differential
  • 29-Spline Axles
  • 8.875" Diameter Ring Gear
  • Fits 3.08 & Up Gear Ratios
  • $559.99
    Chrysler 8.375
    Detroit Locker 912A553 - Detroit Truetrac Differentials
    357-912A553 1997-07 Chrysler Truck/Van Truetrac Differential
  • 29-Spline Axles
  • 8.375" Diameter Ring Gear
  • Fits 2.73 & Up Gear Ratios
  • $491.99
    Chrysler 8.75
    Detroit Locker 913A572 - Detroit Truetrac Differentials
    357-913A572 1969-74 Chrysler Truck/Van Truetrac Differential
  • 30-Spline Axles
  • 8.75" Diameter Ring Gear
  • Fits 2.76-4.56 Gear Ratios
  • $509.99
    Detroit Locker 914A583 - Detroit Truetrac Differentials
    357-914A583 1969-74 Chrysler Truck/Van Truetrac Differential
  • 33-Spline Axles
  • 8.75" Diameter Ring Gear
  • Fits 2.76-7.56 Gear Ratios
    More info on Detroit Locker 914A583
  • $685.99
    Chrysler 9.25
    Detroit Locker 913A368 - Detroit Truetrac Differentials
    357-913A368 1974-07 Chrysler Truck/Van Truetrac Differential
  • 31-Spline Axles
  • 9.25" Diameter Ring Gear
  • Fits 2.76-7.56 Gear Ratios
  • $509.99
    Chrysler and Ford Dana 80
    Detroit Locker 915A567 - Detroit Truetrac Differentials
    357-915A567 1994-02 Chrysler and 1998-07 Ford Truck/Van Truetrac Differential
  • 35-Spline Axles
  • 11.5" Diameter Ring Gear
  • Fits 3.73 & Down Gear Ratios
  • $583.99
    Ford 10.25/10.5
    Detroit Locker 915A550 - Detroit Truetrac Differentials
    357-915A550 1985-07 Ford Car/Truck Truetrac Differential
  • 35-Spline Axles
  • 10.25"/10.5" Diameter Ring Gear
  • Fits All Gear Ratios
  • $529.99
    Ford 7.5
    Detroit Locker 912A316 - Detroit Truetrac Differentials
    357-912A316 1983-07 Ford Car/Truck Truetrac Differential
  • 28-Spline Axles
  • 7.5" Diameter Ring Gear
  • Fits All Gear Ratios
  • $449.99
    Ford 8.8
    Detroit Locker 912A562 - Detroit Truetrac Differentials
    357-912A562 1983-07 Ford Car/Truck Truetrac Differential
  • 28-Spline Axles
  • 8.8" Diameter Ring Gear
  • Fits All Gear Ratios
  • $449.99
    Detroit Locker 912A563 - Detroit Truetrac Differentials
    357-912A563 1997-07 Ford Car/Truck Truetrac Differential
  • 28-Spline Axles
  • 8.8" Diameter Ring Gear
  • Fits All Gear Ratios
  • $435.99
    Detroit Locker 913A561 - Detroit Truetrac Differentials
    357-913A561 1983-07 Ford Car/Truck Truetrac Differential
  • 31-Spline Axles
  • 8.8'' Diameter Ring Gear
  • Fits All Gear Ratios
  • $449.99
    Ford 8
    Detroit Locker 912A580 - Detroit Truetrac Differentials
    357-912A580 To 1978 Ford Car/Truck Truetrac Differential
  • 28-Spline Axles
  • 8" Diameter Ring Gear
  • Fits 3.25" & Up Gear Ratios
  • $489.99
    Ford 9
    Detroit Locker 912A587 - Detroit Truetrac Differentials
    357-912A587 To 1979 Ford Car/Truck Truetrac Differential
  • 28-Spline Axles
  • 9" Diameter Ring Gear
  • Fits All Gear Ratios
  • $479.99
    Detroit Locker 913A586 - Detroit Truetrac Differentials
    357-913A586 1976-87 Ford Car/Truck Truetrac Differential
  • 31-Spline Axles
  • 9" Diameter Ring Gear
  • Fits All exc. 2.72 Gear Ratios
  • $479.99
    Ford and Jeep Dana 44
    Detroit Locker 913A589 - Detroit Truetrac Differentials
    357-913A589 1977-79 Ford Car/Truck and 1997-06 Jeep Truetrac Differential
  • 30-Spline Axles
  • 8.5" Diameter Ring Gear
  • Fits 3.73 & Down Gear Ratios
  • $439.99
    Detroit Locker 913A590 - Detroit Truetrac Differentials
    357-913A590 1977-79 Ford Car/Truck and 1969-79 Jeep Truetrac Differential
  • 30-Spline Axles
  • 8.5" Diameter Ring Gear
  • Fits 3.92 & Up Gear Ratios
  • $439.99
    GM 10-Bolt
    Detroit Locker 911A319 - Detroit Truetrac Differentials
    357-911A319 1975-89 GM Car/Truck Truetrac Differential
  • 26-Spline Axles
  • 7.5'' Diameter Ring Gear
  • Fits 3.23 & Up Gear Ratios
  • $375.99
    Detroit Locker 911A415 - Detroit Truetrac Differentials
    357-911A415 1975-89 GM Car/Truck Truetrac Differential
  • 26-Spline Axles
  • 7.5'' Diameter Ring Gear
  • Fits 3.08 & Down Gear Ratios
  • $375.99
    Detroit Locker 912A317 - Detroit Truetrac Differentials
    357-912A317 1988-05 GM Car/Truck Truetrac Differential
  • 28-Spline Axles
  • 7.5''/7.6'' Diameter Ring Gear
  • Fits 3.23 & Up Gear Ratios
  • $375.99
    Detroit Locker 912A556 - Detroit Truetrac Differentials
    357-912A556 1971-89 GM Car/Truck Truetrac Differential
  • 28-Spline Axles
  • 8.5'' Diameter Ring Gear
  • Fits 2.73 & Up Gear Ratios
  • $409.99
    Detroit Locker 912A557 - Detroit Truetrac Differentials
    357-912A557 1971-89 GM Car/Truck Truetrac Differential
  • 28-Spline Axles
  • 8.5'' Diameter Ring Gear
  • Fits 2.73 & Up Gear Ratios
  • $409.99
    Detroit Locker 913A481 - Detroit Truetrac Differentials
    357-913A481 1988-Up GM Car/Truck Truetrac Differential
  • 30-Spline Axles
  • 8.5''/8.6'' Diameter Ring Gear
  • Fits 2.73 & Up Gear Ratios
    More info on Detroit Locker 913A481
  • $409.99
    GM 12-Bolt
    Detroit Locker 913A315 - Detroit Truetrac Differentials
    357-913A315 To 1982 GM Car/Truck Truetrac Differential
  • 30-Spline Axles
  • 8.875" Diameter Ring Gear
  • Fits 3.73 & Up Gear Ratios
  • $409.99
    Detroit Locker 913A555 - Detroit Truetrac Differentials
    357-913A555 1964-72 GM Car Truetrac Differential
  • 30-Spline Axles
  • 8.875'' Diameter Ring Gear
  • Fits 3.08-3.90 Gear Ratios
  • $439.99
    Detroit Locker 914A575 - Detroit Truetrac Differentials
    357-914A575 1964-72 GM Car/Truck Truetrac Differential
  • 33-Spline Axles
  • 8.875" Diameter Ring Gear
  • Fits 4.10 & Up Gear Ratios
  • $429.99
    Detroit Locker 914A576 - Detroit Truetrac Differentials
    357-914A576 1964-72 GM Car/Truck Truetrac Differential
  • 33-Spline Axles
  • 8.5/8.6" Diameter Ring Gear
  • Fits 3.08-390 Gear Ratios
  • $449.99
    GM 14-Bolt
    Detroit Locker 914A538 - Detroit Truetrac Differentials
    357-914A538 1981-07 GM Truck Posi Unit
  • 33-Spline Axles
  • 9.5" Diameter Ring Gear
  • Fits All Gear Ratios
  • $559.99
    GM Dana 60
    Detroit Locker 913A389 - Detroit Truetrac Differentials
    357-913A389 To 1974 GM Truck/Van Truetrac Differential
  • 30-Spline Axles
  • 9.75" Diameter Ring Gear
  • Fits 4.10 & Down Gear Ratios
  • $599.99
    GM Dana 60HD
    Detroit Locker 915A385 - Detroit Truetrac Differentials
    357-915A385 1975-77 GM Truck/Van Truetrac Differential
  • 35-Spline Axles
  • 9.75" Ring Gear
  • Fits 4.10 & Down Gear Ratios
  • $509.99
    Detroit Locker 915A386 - Detroit Truetrac Differentials
    357-915A386 1975-77 GM Truck/Van Truetrac Differential
  • 35-Spline Axles
  • 9.75" Ring Gear
  • Fits 4.56 & Up Gear Ratios
  • $579.99
    Detroit Locker 915A387 - Detroit Truetrac Differentials
    357-915A387 1977-87 GM Truck/Van Truetrac Differential
  • 35-Spline Axles
  • 9.75" Diameter Ring Gear
  • Fits 4.10 & Down Gear Ratios
  • $579.99
    Detroit Locker 915A388 - Detroit Truetrac Differentials
    357-915A388 1977-87 GM Truck/Van Truetrac Differential
  • 35-Spline Axles
  • 9.75" Diameter Ring Gear
  • Fits 4.56 & Up Gear Ratios
  • $579.99
    GM and Ford Dana 44
    Detroit Locker 913A591 - Detroit Truetrac Differentials
    357-913A591 To 1980 GM Truck/Van and 1983-96 Ford Car/Truck Truetrac Differential
  • 30-Spline Axles
  • 8.5" Diameter Ring Gear
  • Fits 3.73 & Down Gear Ratios
  • $449.99
    Detroit Locker 913A592 - Detroit Truetrac Differentials
    357-913A592 To 1980 GM Truck/Van and 1983-96 Ford Car/Truck Truetrac Differential
  • 30-Spline Axles
  • 8.5" Diameter Ring Gear
  • Fits 3.92 & Up Gear Ratios
  • $439.99
    GM and Ford Dana 80
    Detroit Locker 916A427 - Detroit Truetrac Differentials
    357-916A427 1992-07 GM and 1990-98 Ford Truck/Van Truetrac Differential
  • 37-Spline Axles
  • 11.5" Diameter Ring Gear
  • Fits 4.10 & Up Gear Ratios
  • $583.99
    Jeep Dana 30
    Detroit Locker 912A584 - Detroit Truetrac Differentials
    357-912A584 1971-06 Jeep Truetrac Differential
  • 27-Spline Axles
  • Fits 3.54 & Down Gear Ratios
    More info on Detroit Locker 912A584
  • $559.99
    Detroit Locker 912A585 - Detroit Truetrac Differentials
    357-912A585 1971-06 Jeep Truetrac Differential
  • 27-Spline Axles
  • Fits 3.73 & Up Gear Ratios
    More info on Detroit Locker 912A585
  • $375.99
    Jeep Dana 35
    Detroit Locker 912A569 - Detroit Truetrac Differentials
    357-912A569 1984-06 Jeep Truetrac Differential
  • 27-Spline Axles
  • 7.56" Diameter Ring Gear
  • Fits 3.54 & Up Gear Ratios
  • $379.99
    Land Rover
    Detroit Locker 910A400 - Detroit Truetrac Differentials
    357-910A400 1985-93 Rover Type Truetrac Differential
  • 10-Spline Axles
  • Fits 3.54 Gear Ratio
    More info on Detroit Locker 910A400
  • $429.99
    Detroit Locker 910A416 - Detroit Truetrac Differentials
    357-910A416 1985-93 Rover Type Truetrac Differential
  • 10-Spline Axles
  • Fits 3.54 Gear Ratio
    More info on Detroit Locker 910A416
  • $429.99
    Detroit Locker 910A460 - Detroit Truetrac Differentials
    357-910A460 To 1985 Rover Type Truetrac Differential
  • 10-Spline Axles
  • Fits 4.7 Gear Ratio
  • $705.99
    Detroit Locker 910A461 - Detroit Truetrac Differentials
    357-910A461 To 1985 Rover Type Truetrac Differential
  • 10-Spline Axles
  • Fits 4.7 Gear Ratio
  • $705.99
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