Anyone run an aftermarket exhaust brake on one of these? I've read that its hard on the valves. What if only used occasionally? It's in a 2001 international 4400 with 6+ manual trans.
When downshifting my international 6+ and using the clutch I get a violent skipping or slipping vibration when letting out the clutch. If I match the engine rpms and dont use the clutch, it doesn't do it. Is my clutch bad?
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