Sorry for not replying sooner, I didn't have mail notifications on, and forgot about the thread. It turns out it's not related necessarily to engine rpm. It's more a 35-45mph thing, pretty much on acceleration up to and through that point. If I let off the accelerator the problem goes away.
I did find that my outer tie rod ends are hosed, and have some play in them. I'm currently working on replacing those, but holy crap the jam nut is stuck on something fierce. I have pb blasted, torched, hammered. I cannot get the thing off. I'm starting to think that it's welded on!
I'll have to check the trans mount, and the height difference if I ever get these rod ends done.
