Subject: Cracked the severe grinding noise case! IP: Logged
Message: My 03, 5.9, 4x4 QC would occasionally make this severe grinding, vibrating sound while going up hill in OD. Although my Roadmaster Suspension was adjusted to specs, it lifted the rear of my bed to high. I've adjusted it down several weeks ago and the problem has stopped. Apparently I had a u-joint at to great of an angle!
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