[TQ29m]

Or, could be a flap on an oil line, slowing the flow one way, or clearances out of spec, internal galleries leak, and gear pumps are not infallible either, how long does it take for this condition to happen, just throwing out stuff to see if any thing sticks, I've had this before, you just have to ck all possibilities.or, it could be plumbed wrong, and can't keep up, should be a wide and a narrow gear in the pump, wide for volume, narrow for pressure 😉.