Posted 4/14/2024 14:49 (#10706545 - in reply to #10706375) Subject: RE: Vibration and low power Cummins 8.9
NCFL
Check your flex plate at rear of crankshaft as well as u joints on shaft going from flex plate to transmission. I've had to replace both when I had a STX 325.
This won't affect power but will cause vibration. Should check turbo boost as well.
Vibration and low power Cummins 8.9
