[KobraKarl]

Ronald,

I have a 69 (later) trac-loc and it is very smooth ,but locks up well on acceleration.

You mentioned u-joints rubbing? thats a coincidence, because today I was looking at my rear brake rotors and I noticed some very heavy rounding off of the inboard U-joint ,I've never heard any thing ,but the damage was clearly fresh. I looked with a flash light but couldnt identify anything obvious it could be contacting .......any idea???.............any one ?