Hi fellas. Got a problem with the big C. When the speedo hits 35mph a vibration starts that seems to run through the whole car. It gets worse till it hits it's peak about 45-50mph. Then miraculously, at 55 it disappears and everything is as smooth as silk. I've driven it in first and second and wound it up to the same rpm and no vibes so it's got to be a function of that mph range. New BFG's have less than 100 miles on them. Every piece of suspension front and rear has been done including springs, torsion bars, shocks, steering box, wheel bearings and every bushing and joint there is. Alignment is dead on at -.5cam +2.5cas and 1/16 toe in. The only possible thing I can think of is driveshaft or u joints but I don't want to start chasing wild ducks if you guys have any other suggestions. Vibration was there prior to all the work and it's driving me loco. Thanks in advance for any help you can offer
