Application
Ford 9″ with 31 spline axles
Hoosier 31 Spline Posi Unit
A perfect replacement for worn-out OEM clutch differentials
Forged steel halves eliminate breakage common to cast units
Forged Steel Case Halves
• Heat treated
• Fully machined
• Provides a light, durable, and rigid unit
Intended as a Factory Replacement
For high output vehicles, consider options below
Do Not Use Synthetic Gear Oil
Will adversely affect unit operation
Voids all manufacturer warranties
Use Petroleum Based 80W-90 or 85W-140
Requires 4 ounce bottle of limited-slip additive
Related
Strange clutch style – N1970F
Eaton Truetrac – N1979
Eaton Detroit Locker – N1971
S-Series case – N2205
Pro Iron case – N1905
HD Pro Alum case kit – P3200
