My maxjax lifts one side about 3/4" higher than the other (not measuring off the floor, measuring the actual travel inside the posts) w/ the system bled and rebled multiple times, including bleeding it w/ weight on it. It's not enough to cause a problem but it does make me wince a little as I'm lifting 4500 lb vehicles on this thing. It has no mechanical equalizer so it is what it is....how much of a difference are you seeing from one side to the other if you lift to full height? I use my Maxjax extensively and honestly it is not the best made product for what it costs, but it gets the job done (so far).