And very few manual transmissions have a pump/screen (coarse filter) set up and so the swarf in the fluid gets circulated and recirculated, potentially damaging bearing races, rolling elements, gear faces as it goes.That's why I repeatedly advocated for performing oil changes on manual
transmission regardless of manufacturers claiming it's 'lifetime fluid'. One
early change ideally at 1000 mls or so followed by changes every 30,000
or 50,000 miles at least. Personally I tend to keep the intervals even shorter.
Main grounds for that little effort is simply avoiding such issues like that the
OP suffers from.
In gear driving ??Clean - will do!
parts - I appreciate your interest. FWIW - read 9 articles on TO bearing (and pilot) bearings - all said the symptoms occur when the clutch pedal is being depressed. Noise at top of pedal - TO, at bottom - pilot. I have NO noise (nor any of the other symptoms) with any clutch pedal pressure/movement. Noise happens only when in gear.
Thanks for updateGuys - an update - problem is DIFFERENTIAL. Many shavings in differential oil. Probably will look for a used transmission, and "while he's in there" will have new clutch, pressure plate, release bearing, etc put in. A couple of weeks ago I ran over a truck wheel weight (5" LONG - went fully into tire). Felt like I ran over a rock. Apparently that may have damaged the diff. Thank you all for your interest!