Help! Driveshaft-car up in air apart dunno what to check next
Carrier bearing bushing (Propeller bushing) holding up center of driveshaft was shot. There was a thumping right under front seats only during early accel. Cut off exhaust (bolts rusted, sigh). Could not figure out how the hell you get the driveshaft off the trans or the rear diff. Saw pics online that you leave the rubber isolators on the trans and diff and remove the driveshaft from those. Even with all nuts and bolts out, could not get either side of driveshaft out. Figured out I could remove the rear half of driveshaft if I unbolted the isolator from the diff and left it on the driveshaft. Front driveshaft I needed some kind of torx socket that I dont have but since the bearing is on the rear driveshaft I could leave it in. Top part of bushing was ripped, so confident that was the problem. Installed new OEM bearing/bushing. Reinstalled rear driveshaft and everything else. Celebrate for doing a PITA job on jackstands, feel like a real man.
On test drive, now there is a metal on metal grinding noise that goes faster and slower with driveshaft speed. Suddenly feel less like a man and more like a loser. Sigh. Trying to figure in my head the only thing what could make that noise, I start to wonder if the metal dust plate that slides on after the bearing/bushing unit was supposed to be tight against the bushing, and I left it loose and now its spinning loosely on the driveshaft? Thats the only thing I could think of.
Jack car up again, exhaust off again (at least it has new hardware now no rust) heat shield off again. I look at the dust shield and while it IS tight against the bushing, its spinning with the driveshaft. If I stick a broomstick in one wheel and put car in neutral, I spin the other wheel as fast as I can and the driveshaft is spinning but no noise. Argh so frustrating. No idea where noise is coming from, dont want to put car back together without checking everything because I know its still going to make that noise.
First question: this happen to anyone else? What should I check?
Second question: Is the dust shield supposed to somehow attach to bearing/bushing unit and not spin with driveshaft and thats my noise? Or is it supposed to spin around and just slide against the bushing shield?