Drove about 3500 miles a month before, no problem, other than filter.

I replaced support + bearing - as I could feel a bad vibe when starting out.

I used a automatic center punch to mark - front ds to rear ds, front flange

to fr ds, rear ds to rr flange.

Flex discs no cracks, and bolt surfaces cleaned, did not line up marked ds

ends to flanges.

Lined up marks only on both ds's, had ds vibe about 50mph.

Maybe ds marks were off, moved one spline, as marks were close.

Vibe at 45mph.

Any ideas?