about your engine screaming. . . my ofna did the same thing, i checked the diffs, put new oil in, checked the clutch bell/spur gear but everything was in perfect condition. so i started it up, drove it for about 5 minutes and it was fine, then the screaming engine and not going anywhere again. i had forgotten to check the set screw. all i did was tighten it and its been running perfect ever since. i know you figured out why it was doing it but i just posted it so maybe somebody wont make the same dummy mistake as i did by overlooking the set screw