After several years use I started having fluid pushout problems with my expensive JW powerglide. I had a local PG guy pull it down twice in one year and he including consultation with JW could not pinpoint the problem. The next year I carried it to another PG guy and even in his first go-thru it still pushed out fluid. However when he went through it the second time he discovered the pump face was not entirely flat it had a .008 warp in it. He had that machined flat and no more problems. It took 2 yrs and at least 4 removals to get it right. My helper and I were about ready to put it in the trash!!