4 stop Tac 20 hydro. Car shoes r those plastic slides and piston guides are truck with rollers ... I'm getting a 1068 jack sync shutdown once a week or so. They r def getting unbalanced I can feel it when it arrives and leaves the top floor. I do see one side with a heavy weep compared to the other jack. But I am not losing any oil in scavenger or down over casing to pit .. I wanna change seals to fix this problem but I'm not that confident it will solve the problem. I'm thinking I should see oil in the pit for the seals to b the problem.. what do u guys think ?