I took my buggy out tonight (losi eu) to get it ready for some track time on sunday and went to check the ride height on the rear and when i pressed the rear end down there was no rebound in the shocks. I took the shocks off and check each one for rebound and they did. I then changed the rear hinge pins but still got nothing. I also changed the oil in the rear shocks. anyone have any ideas on what my problem might be?