Ford C4 Transmission Performance 8 Pinion 2.20 Ratio First Gear Planetary Gear Set Convert any one-piece GM TH400

Convert any one-piece GM TH400 case into a two-piece case with our Speedmaster TH400 case adapter

Speedmaster timing tabs are precision-manufactured and bolt on using your existing timing cover bolts

Steel Mounting Stud Included

easily outperforming stock ignitions

Ford C4 Transmission Performance 8 Pinion 2.20 Ratio First Gear Planetary Gear Set Convert any one-piece GM TH400Speedmaster offers the maximum strength 8 pinion planetary gearset. Our 2. 20 gearset are assembled with Torrington bearings to replace the factory spec thrust washers, which reduces the friction, heat, and stress that the planetary gearset is subject to.