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• Innovative:
Patent pending Wavetrac® design automatically improves grip in low traction conditions. This feature is truly innovative and unlike any other torque biasing diff design.

• Superior Materials:
9310 steel gears run in case-hardened billet steel bodies. ARP® fasteners used throughout.

• Maintenance Free:
As supplied new, the Wavetrac® differential will perform a lifetime of service without maintenance or rebuilds.

• Limited LIFETIME Warranty:
All Wavetrac® differentials include a transferable, Limited Lifetime Warranty.


9" Ford
31 Spline
*Requires Aftermarket 3.250" Case
Mfg. # 56.309.175WK


Deciding what posi to buy? Truetrac vs Wavetrac on YouTube:

Wavetrac - 9" Ford, 31 Spline (Manufacture # 56.309.175WK)

SKU: 5W9F31
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