My drivers seat tends to shift back and forth. when I am driving. I have a spinal injury and this thing is just killing me, and I was wondering if anyone had any good how to's on any drivers seat repair? When i hit the brakes the seat rotates forward, and then when i hit the throttle it will rotate back the opposite direction. It also does this over bumpy terrain. Also, sometimes when i lift my seat all the way with the like "Jack" handle on the left side, after a while it sinks down to a lower level and i have to raise it. Any help would be massively appreciated.