700-R4 with valve kit Shift Correction Package This valve body kit deals with these problems:* Inadequate pressure rise* Burned clutches and bands* Erratic shift points* Soft or bump up shifts* Bump on coast down shifts* Raises lock up speed* 2nd and 3rd flare up* Part throttle searching between 4th and 3rd* New .471 boost valve included to replace worn OE valve. The Superior 700-R4 kit contains an anti-stick throttle valve spring.2. This package deals with the weak 3-4 clutch problems in a very effective manner.3. The feed to the clutch is made more direct.4. Throttle valve travel is changed to stop slipping on very light acceleration. 5. Timing is corrected on the 3-2 downshift.6. Overall apply pressure and oil flow is increased. A high performance version (K700-R4-HP) is offered for street rods, racing and extreme heavy duty.7. This valve body kit comes supplied with the Corvette servo, the big .471 TV boost valve and throttle valve sleeve for full throttle 3-4 upshifts plus valve body modifications that keep apply pressures up to needed capacity. Note to purchasing: Ask for Superior part numbers K700-R4-V(w/ valve), K700-R4 (regular w/o valve), and K700-R4-HP (High performance)