Pulled the rear end cover and nothing's moving, so it's upstream from there. Working on getting at the u joint. I've got the bolts out of the torque tube ball retainer, but the retainer is catching on the rear mount. Maybe I can try to jack the tranny a little to get some clearance. I expected to get some oil from when I loosened the torque tube retainer and got none, so that may not be a good sign.

There sure is a lot of North Dakota prairie up under that truck. Also learned about the rule of 25: I could stand to be about 25 years younger and 25 pounds lighter. It's not as easy sliding in and out from under a truck as it used to be.

1938 Chevy 1/2-ton
More info in the Gallery Forum
She looks good at 50 yards, and 35 miles per hour, on a dark night.