Oil pressure drops
#1
Oil pressure drops
This is a weird one. I have a 1996 2500 5.9 bone stock with 217,000 miles. Engine has been maintained well. My problem is driving down the road oil pressure is about 45 psi. If pulling a hill and auto trans shifts down, oil pressure drops to about 15 psi on stock gauge???? Engine seems strong, but I am concerned with this. when trans shifts back into overdrive oil pressure goes back up. Just the opposite of what it should do. I have not put a mechanical gauge in yet to test. It seems like maybe oil pump pickup tube may be cracked. Has anyone had this problem?
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