Thanks for the replies and ideas.
When I got home I tinkered a minute with it. I could roll it back easily but forward was more difficult. I worked it back a forth a few times and everything seemed to loosen up. I took it for a quick drive and noted that the new vibration was still there around 3200rpm. At 6:30 this morning my brain had let me down and I attributed it to the rear end, but it's definitely associated with the engine pulses under acceleration and clears up by 3500rpm. It's strong enough to feel it coming through the drive shaft tunnel in the cockpit, hitting my leg.. Happens only under load and only around 3200 rpm. Maybe the brake is still dragging and the engine is working harder. I drove about 5 miles and smelled what seems like hot rubber in the cockpit. Came home and sniffed the car (must have looked odd) and the smell definitely was coming from the back. Tire and belt aren't rubbing anything so can't imagine where that smell is from.
Promptly gave up for the day and went in for a beer. Will look again tomorrow. I've never pulled that rear wheel assembly out so I may be in for some fun.
