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9 1/4 " Spicer "Trac-Lok" 2-pinion style clutch sure-grips work nicely for street cars and half ton pickups making under 350 hp.
Reproduction 8 3/4" clutch sure-grip ("powr-lok") includes upgraded 1 piece 30 spline side gears and 4340 cr-mo spider gears
DoctorDiff Dana 60 heavy duty 4-pinion clutch sure-grip ("Powr-Lok") posi includes upgraded 1 piece 35 spline side gears. Unit is built with OEM Spicer clutch pack.
All driveshaft assemblies are built with seamless 4130 cr-mo tubing, 29 spline 727/A833 slip yokes, heavy duty 1350 U-joints, then dynamically balanced.
Dana 60 Spicer "Trak-Lok" 2-pinion style clutch sure-grips work nicely for street cars making under 400 hp
8.75" Eaton True-Trac fits all 8.75" castings all ratios and all stock axles.
