Hi all ... update:
I replaced the diff fluid with 80w90 and a bottle of motorcraft additive friction modifier. The fluid that came out looked ok (no metal particles).
I went for a 15-mile drive which included a lot of taking corners and a few burn outs. Then 2 days later I went for a 30-mile...
10 mile drive and no noise. didn't feel any chatter or anything from the back. rolled the car around in the garage and it seems fine, no noise.
I guess I'll change the fluid and then take it for a longer drive, go do donuts in a parking lot or something and see how it behaves when I really heat...
Update: This morning I pulled the wheels and brake drums off. Everything looks good there, I checked u joints and those are good. Also there is no noise while rolling the car today.
I checked fluid in the diff and it's full, I don't see any sparkles of metal in it, and it smells like normal...
Yesterday I heard what I thought was a clicking while backing into the garage.
But then I didn't hear it again.. so I thought maybe a rock in the tire.
Well after a drive today it's much worse.
Here are 2 videos of my wiggling the rear tire while on the jack and just rolling the car on the...
Welcome!! that's going to be a fun project! I've found this forum has a wealth of knowledge which has helped me quite a bit since acquiring my latest Cuda