RTS Differential, Full Spool 35 Spline, True Race Lightweight Ford, 9 in, Each

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RTS Lightweight True Race Spools RTS Lightweight True Race spools give you the traction that you need by locking the axle shafts together, forcing your rear tires to turn at the same speed. They're CNC-machined from forged chromoly steel to provide a more rigid ring gear mounting. This eliminates the gear failure caused by case deflection or differential side-gear failure. Fits 3.250″ bore aftermarket case's. Features • Machined from 8620 forged steel • Lightened to reduce rotating weight • Broached 31 spline with 30° pressure angle • Heat treated • Finish machining after heat treat to bring surfaces within specifications • Designed In House