GM 700-R4 Hydraulic Lock-up Speed Calibration Package The lock up valve and sleeve was used in early valve bodies 81 thru 86. The later valve bodies, 86 thru 89, kept the valve bore, but were non-functional. 90 thru 93 valve bodies were produced without the valve bore. As long as the bore is in the valve body, the hydraulic package will apply. This kit includes 5 different springs giving 5 select lock up speed choices and allows non-electrical operation of lock up. This kit includes all valves necessary, no more searching through cores looking for the inner valve! This Superior Package comes with instructions in English and Spanish.