I tried changing one of the idlers and that wasn't it. It sounds like it might be coming from the back of the engine. Anyone ever heard of a throwout bearing doing this? I replaced the throwout, so I would hope that isn't it, but it sounds like it might be coming from the back. Just not sure...

Anybody got any more ideas? I'd sure like to get to the bottom of this, and I'm not having much luck diagnosing it myself! <img src="/forums/images/graemlins/confused.gif" alt="" />

96 F250 4x4 Powerstroke
92 F150 4x4 Cummins 4BT Turbodiesel
90 Mitsubishi Mighty Max 4x4 3.0