Can anyone teach me a little about how my machine drives and help troubleshoot my issue?! Sometimes I hear a whining sound (like a relief valve is lifting towards rear of machine) and when I go to drive I have very little power and engine does not rev up. However, when this happens if I lift the front bucket or curl the front bucket it operates well - engines revs right up and drives with full power. First, how are these two things related?! More importantly, what should I do to troubleshoot? The dealer just repaired parking brake and had rear end pulled apart, no issues, new oil and filter. It wasn't happening before that but I doubt that had anything to do with this problem. I use Case HY-Tran Premium in rear end and Case TCH for hydraulic oil. The hydraulics always work very strong...no issues there. An when it does drive, it drives strong - Not that I do, but I can even start off driving in 4th gear if I wanted to. I tested that out.
