GM Powerglide / TH400 Big Shaft Stator Tube Kit When roller rocker arms are

When roller rocker arms are installed

Upgrade your transmission with the Speedmaster heavy-duty forward clutch hub

This Speedmaster 300M steel crank gear

which is welded to the pickup box

Speedmaster has redesigned the power gear sets to incorporate four pinion gears--unlike a stock 3-pinion style--to increase their load-handling characteristics

GM Powerglide / TH400 Big Shaft Stator Tube Kit When roller rocker arms areUpgrade your GM Powerglide or TH400 for extreme horsepower applications with this big shaft stator tube kit. Designed for use with 1 1 8" diameter, 35 spline input shafts, this heavy duty tube is ideal for high performance builds demanding maximum strength and durability.