SKU: ATI203200
MPN: 203200
The GM PG Manual Valve Body Forward Pattern from ATI PERFORMANCE is a precision-engineered transmission control component designed for builders and enthusiasts who demand manual shift authority over their Turbo 400 (TH400) automatic transmission. This valve body replaces the factory unit to deliver crisp, responsive shift timing under full driver control—ideal for street rods, drag racing builds, and high-performance muscle cars.
ATI's valve body is crafted from ductile iron, ensuring durability and thermal stability under sustained high-RPM operation. The forward shift pattern geometry optimizes fluid flow and spool valve response, reducing lag between your input and actual transmission movement—critical when launching hard or managing power in a supercharged or turbocharged engine. The casting accommodates OEM or aftermarket accumulators and is compatible with manual shift levers and floor-mounted trans controllers.
This valve body suits hot rod builders, drag racers, and vintage muscle car restorers who operate a TH400 and seek enhanced performance. While it is designed for a direct bolt-in installation, some custom setups may require additional adjustments. Whether upgrading a classic Chevy, Pontiac, or Oldsmobile platform, this forward pattern configuration puts gear changes directly in your hands.
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