8.5in. Oldsmobile 31spline 12 bolt (factory 3.08 or 3.23; or Richmond gear ring/pinions).
This clutch-type limited slip positraction unit is suitable for daily driven vehicles and mild off-road use. Its clutches work to maintain synchronization between the tires, transferring more torque to the tire that has the best grip while reducing torque transfer to the tire that has less grip.
  • Positraction Differential

Application Summary:

Year Make/Model
1968 Oldsmobile 442
1965-1981 Pontiac Catalina
1965-1971 Pontiac GTO
1968 Pontiac LeMans

Fast Efficient Shipping

Through our distribution network Deliveries can be as fast as Next Day Delivery.
Delivery times vary by destination, tracking information is provided with every purchase.

Get it Installed

JB's Power Centre offers on-site professional installation services in Calgary and Edmonton, AB.
We have on staff licensed Mechanical Technicians as well as MECP Certified 12-Volt Technicians.

* Extend your products Manufacturer Warranty

All products include a manufacturer warranty, but you can extend this warranty with
JB's Purchase Protection Plan
*Available on select products.

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