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8.5" Oldsmobile 31Spline 12 BOLT (factory 3.08 or 3.23, or Richmond Gear Ring & Pinions). | ZP PGM8.5O-3-31 | RANDYS Worldwide

Product Details

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
  • Fits 8.5" Oldsmobile
  • 12 bolt design
  • 31 spline
  • OEM 3.08 and 3.23 gear sets only

Technical Notes

Warranty Information

Warranty information unavailable


Brand USA Standard Gear
Prop65 Warning WARNING: This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer. For more information, go to
Keywords 12,3.08,3.23,31spl,8.5,BOLT,COMPLETE,factory,GM,OLDS,or,POSITRACTION,RP,RG,s,ZP
UPC 883584590064
ProxyNumber 59006
Width 11.00 in
Length 11.00 in
Depth 11.00 in
Weight 21.4300 lb
Brand: USA Standard Gear

8.5" Oldsmobile 31Spline 12 BOLT (factory 3.08 or 3.23, or Richmond Gear R&Ps

ZP PGM8.5O-3-31

31 in stock

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Warehouse Availability
  • CA 1
  • KY 0
  • MN 0
  • TX 2
  • WA 28