on the pass. side ot the tranny there is a flat area just above the pan with numbers stamped into it the first number will the year 6 would be an 86 0 would be a 90 2 could be 82 or 92 700s built before 89 had three pressure taps on th e pass side newer ones do not 87 came out with aux. valve body if you drop the pan you will see a steel tube from the pump to a small valve body in the rear.