Hey guys,

I've seen plenty of threads on here about vibrations and stuff but i'm not sure, they haven't really been much help for me....
I have a 1998 4runner 2WD. It only happens when I am going freeway / highway speeds and go above 60-65mph. Once I go above that I feel noticeable vibrations all around. Like dadadadadadadadada going down the road. Driving around town and under 60-65 its smooth no vibrations. I can feel it in my steering wheel and I can see the passenger seat shaking when no one is in it. I can also see the auto shifter shaking too. Everything kinda shakes because of it. I replaced so many things hoping that this vibration would go away but it's quite frustrating to say the least that it hasn't gone away. It's annoying because I drive other cars and it's smooth as butter and I feel nothing. I know it could be a list of things but at this point It should be able to be narrowed down somewhat.

At this point in time I have replaced, both L&R outer tie rods, lower ball joints. I have brand new camburg UCA's. Brand new whiteline poly LCA bushings. New energy suspension steering rack bushings. New king shocks. All four tires are new put on early last year and have been rotated and rebalanced recently, none asked for any crazy weight or anything.

Anyone have any ideas?
I have felt my driveshaft for play too to see if it is that but I gave both universal joints a strong wiggle and neither front or rear had play. I also want to do the tac weld and steering plastic ball shim thing. Not sure if that would help though.
I am trying to think of other things I could replace related to the steering / suspension.

Could it be the inner tie rods? I felt them before and they feel fine no play or anything.

Shot rear control arm bushings?

Out of balance driveshaft?

Worn out rag joint / steering universal joint?

Steering rack guide?

Any input is appreciated. Thanks.