Are you referring to them tilting up and down a bit when you accelerate. There are some rubber mounting/bushings in the seat that get flogged out and were superceded to a new part number. I can look at my service bulletins and try to find a part number if you like?
Yeah i have the same problems with my passenger front seat. when i brake it moves forward a little and back when accelerating
I have been meaning to pull it out to check it out but havent every done it.
They are adjusted by a long threaded bar, which turns and fastens / adjusts with internally threaded 'nuts' on the other half of the frame. If the threads are worn, you may be able to get away with replacing the 'nuts' that slide over the threads, if you can get them. Otherwise, you'll havet o purchase entire new seat runners - big $$$