NIB Detroit truetrac 8.8 31 spline posi unit

tom's2005gto

Registered User
Brand new never installed. Deyroit Truetrac part number 913A561. Comes complete. Has both spacers (thin for IRS and thick for non IRS).

Cost new is $492.90 Selling for $400 shipped. I accept paypal. Must ship to confirmed address, buyer must include phone number.





 
Sorry for my question, but what exactly is the benefit of this in the SC rear end?

Tom

It's a better designed posi unit. Doesn't use the clutch packs like the stock units.

"Detroit TrueTrac lockers are Torsen style limited slip differentials that use helical gears instead of clutch packs to offer automatic torque biased traction to both drive wheels at all times. The ingenious design limits the speed of each wheel to 1.5 times faster or slower than the opposite wheel to provide full-time traction while still allowing for wheel speed differentiation in turns. The heavy duty all-gear design not only makes for quite and smooth operation, it requires no maintenance and will never weaken or wear out like a typical limited slip differential. These unique features make the Detroit TrueTrac ideal for race cars, rally cars, trail rigs, full size trucks, and daily drivers. "
 
Keep in mind our differentials are 29 spline. That said if upgrading to this posi unit then you will also need to upgrade to. A 31 spline axle. That will be an expensive upgrade. Axles for our cars aren't cheap in 31 spline.
 
Keep in mind our differentials are 29 spline. That said if upgrading to this posi unit then you will also need to upgrade to. A 31 spline axle. That will be an expensive upgrade. Axles for our cars aren't cheap in 31 spline.

Didn't realize you guys were 29 spline. Thanks for the clarification. If anyone is upgrading, this is a great unit to do so with.
 
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