Tim, X2 on Jerry's advice to check motor mounts. Tightening them up solved my problem. Even though they are new in your case, won't take long to check to see they're still tight and it would be the easy solution. Well, the easiest thing would be to intentionally slip the clutch and see if that helps. While in high gear at a 30 or so mph and going up hill just ride the clutch a bit causing it to slip. Not for too long, just enough to burn off any oils. May help and if not overdone won't hurt since few will ever drive there trucks to the point of actually wearing out a clutch.
Good Luck,
RonR
The jackhole who built my truck forgot to tighten the rear motor mounts. I would have fired him but I am a one man shop...
He talks to himself incessantly, yet never seems to listen to himself.
Carl
