Valve Body
The valve body is tuned for hydraulic efficiency. Every tolerance is checked to ensure proper line pressure. A precision valve body will provide better, cleaner shifts. Each valve body is disassembled and each layer is flat sanded, then given a final hone for a tighter, flat fit between them. This prevents fluid bleed between the layers.
Next they remove the TV valve and bore the cylinder to fit an oversized replacement valve. The fit on the new TV valve is perfect. These valves are usually fairly sloppy to begin with from the factory. Years of use makes them worse, resulting in sloppy, inconsistent shifting. UT says that you can greatly improve a transmission just by correcting factory flaws. UT increases hydraulic holding capacity by recalibrating orifices to increase fluid volume and pressure that is applied to clutches. Line pressure is increased from 60 to 90 psi (stock) to 80 and then ramp to 180 psi at wide open throttle. Their race valve bodies hold up to 230 psi. This extreme pressure is possible due to UT's exclusive forward drum design.