When we put a ford 9" in daughter's jeep and a double cardon shaft we were
told from drive shaft place that pinion should be pointing 2 degrees below
transfer, it's been in for a year, no vibration.

"Nathan Otis" > wrote in message
...
>I thought I had my pinion angle adjusted pretty well Sunday when I attached
>the driveshaft, but I have a vibration that starts at about 40mph, dies off
>at around 50 and picks up again at about 60.
>
> My helper and I held a carpenters square (the big L shaped one) on the
> diff and lined it up that way, pointing directly at the output of the
> transfercase... Can anyone give tips that will get me dead on?
> n.
>