I have a 1999 Jeep Wrangler Sport with a 4.0 and 5 speed manual trans. The other day I noticed a slight whining noise when I let off the gas. It went away when I gave it gas to speed up. Yesterday I had no issues until I went to lunch. On the way back (only 1 mile away) whenever I pushed on the clutch (or just put it in neutral) or let off the gas there was a strange grinding noise...it seemed to even slow down my jeep. I took a chance and drove it home (10 mile drive) and had no issues until I exited the freeway. No grinding but still a slight whining noise when I let off the gas. I don't think it is clutch related because there is no slipping, I can shift just fine and it happens when out of gear as well. Any ideas?