The trusty Ford C4 automatic transmission has been helping propel FoMoCo hot rods, street machines, off-roaders, and race cars for decades. And although the C4 has proven plenty durable over the years, if you plan on running one behind a high performance engine creating tons of torque, it’s a smart idea to add some upgrades—specifically a stronger valve body.
That’s where the folks at Gearstar Performance Transmission come in.

Gearstar makes billet aluminum valve bodies for the Ford C4 automatic that’ll withstand the rigors of track use. Precision machined with a superb balance of strength and weight, these valve bodies are the perfect upgrade for C4 transmissions used in race or off-road duty, or stuffed behind a rip snortin’ Blue Oval street engine.
These full manual, reverse pattern valve bodies are made in the USA and designed for the 1970+ later model variant of the venerable C4. They’re assembled with stout components to ensure smooth, predictable shifting and reliable performance, season after season.
Better still, Gearstar offers a Ford C4 valve body with a built-in Transbrake, tailor made for racing applications.

All told, if your classic Blue Oval is equipped with a later model Ford C4 transmission, a new valve body from Gearstar Performance Transmission is a smart way to ensure it’ll handle the rigors of a race engine or hot street motor. Click the part numbers below to see pricing and availability.
- GES-GS26311 – Gearstar Performance Valve Body for 1970+ Ford C4
- GES-GS26312 – Gearstar Performance Valve Body for 1970+ Ford C4, with Transbrake

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