OK just wanted to let ya'll know that after further review it looks like it's the rear diff that's locked up, each rear wheel will turn fine by itself but if I try to turn both rear wheels at the same time they are locked down and I can see no movement in the drive shaft going up to the center diff. I think this is a pretty good indicator that it's in the rear as
nitrosportsandrunner had suspected and advised me on.....
The rear diff is coming off and then I'll see what I have to do next.
just wanted to let you know.
Thanks again all, ShanG.