I hope this doesn't make me look a fool, but speed-dependent front end vibration can be a symptom of improperly balanced tires catching a resonance in the suspension, no? I had a Blazer about 10 years ago that had that problem right around 65mph (my excuse for speeding a bit, had to get away from that resonant spot) and after getting the tires balanced it was all gold. Is that maybe something worth checking? Or have you already? Sorry if I missed it in another thread. I'm a n00b here.So maybe that was your 60-70 mph vibration you felt up front??
Which also (almost assuredly) could be marks from former wheel weights... that were not required/needed when the new tires/balancing was done.Ive had them balanced but need to get back to the place I had it done at because the weighs on the front fell off, guess not a good solid bond or something, because you can see where some where, but nothing there now.