While off-roading this weekend the '95 Wrangler developed a slow scraping sound that sounds like sheetmetal edges rubbing past each other (low pitch). It happens only while going downhill and braking with the engine. It happens in and out of 4WD and on paved and unpaved roads. Nothing seems to be hanging on the driveshaft. It sounds like it comes from the center of the Jeep but it is hard to pinpoint. I'm suspecting something related to the clutch or transmission (can these things make such a sound?). All shifting seems to be fine. Also the noise does not happen when braking with the engine on the flat. Any ideas are apreciated.
Thanks