Racing Automatic Transmission Valve Bodies

The proper and efficient operation of your automatic transmission depends on the ability of the system to direct pressurized hydraulic fluid to various actuators at the right time. The pressure is created by the pump which sends oil to the valve body that directs its flow through a series of passages and valves to the clutches and servos. A factory-installed assembly is designed for smooth shifting in favor of comfort. To achieve the desired effect on the street, strip, or track, you may need to perform certain modifications of your gearbox by fitting a suitable high-performance valve body, which is also called the brains of the transmission.

The most cost-efficient option is the installation of a shift improver kit designed to recalibrate your automatic gearbox to make shifting firmer or add more RPMs between gear shifts. In this case, you will need to remove and reassemble the stock valve body. Racing enthusiasts can especially appreciate the ability to manually override automatic shifting. The system featuring manual and automatic modes offers firm shifting in full-automatic mode and gives manual control on lower gears. The installation does not require internal transmission modifications and can be performed with basic hand tools. Such an option is great for street and strip applications.

For avid racers, we can offer a range of full manual valve bodies. Such a system can bypass all automatic shifting operations to give you full control over your gearbox. It provides especially hard shifting and the ability to start at any gear. Note that the installation of such type of valve body may require upgrades of the input shaft, gear sets, drums, and other rotating parts. Drag racing aficionados will find our transbrake kits most suitable for their applications. These systems work similarly to their full-manual counterparts and have an additional “launch” feature. Browse our catalog of racing automatic transmission valve bodies to find the one that can meet your needs.