87 Z28 with zz440 and T5. lost ability to find gears qiute suddenly. shifts to all gears when motor off. With motor running grinds reverse and have to search and force into forward gears even when on the move. Replaced upper cylinder due to finding seepage around boot ( whoever designed the tube with pin set-up??) why not threaded connections??? but anyway Clutch hydraulics are bled GOOD. WTH is going on? Performance clutch, was thinking of making up and adjustable rod for slave cylinder although rod moves plenty and clutch disengages. Could it be a shifter alignment/missing bushings on shifter rods??? Thanks!