From your description it kind of sounds like lack of lube in a way on steering components. Also when was last time belt and tensioner was replaced? It may have oil on it slipping occasionally on high loads. Or it has air in system. After pump replacement was it bled for air? Make sure reservoir is full, jack truck up with wheels off of floor then do a turn to turn 10 times recheck fluid. That is the only thing I can think of unless there is a bind someplace causing your problem.
Wednesday, October 28th, 2015 AT 6:57 AM