Final analysis:
The split shaft was a poor design by Ford (as per Ford.) Ordering a new shaft - "discontinued item." Solution: replace with fabricated one piece shaft.
Doesn't the word "recall" ever come into play?
Jim
Symptoms: light vibration felt throughout the entire vehicle beginning at
> about 55 m.p.h. - increases on deceleration until you get to about 40 mph.
>
> Performed so far:
> New tires - balanced and rechecked. No rim damage. Front end aligned, new
> shocks, all ball joints - titie rods - etc. in excellent condition. Front
> stabilizer (sway) bar bushings replaced.
> CV joints replaced.
> Drive shaft rebuilt, balanced.
>
> HELP!
>
> --
> Jim Mc Namara
>
>