i would not do blocks as they can be sketchy and cause axle wrap. try a lift shackle from autozone. try the u joints first and see if that does the trick

 

Was it under your feet I mean its not off by much n it didn't start doing it bad till I. Lowered the tcase a inch

 

I already got shackles that's my rear height

 

check your trans mount if you havent already

 

Trans mount is good it has no cracks not busted none and like I said only vibrated under feet on acceleration

 

Update it. Vibrated alot when going above 30mph if foots on accelerater

 

Another update pulled front shaft not the problem

 

Have you tried looking at your lefthand upper control arm mount??? Maybe it's cracked, loose, or the bushing is shot??? That's about in the area you mention. Just a thought......

 

It looks alls well didn't start doing it real bad till I dropped the tcase a inch

 

exhaust pipe hitting on crossmember pass side?

 

I know that is but that wouldn't be causing the loss smoothness during hard acceration or hitting the passing gear along with the binding slash nailgun hitting the floor and it would have done it when I pulled both shafts out and put it in gear n punched it it was smooth when I did that so idk

 

whatnail gun something???

 

your front axles not staying engaged is it ???

 

No sir it can't engage with no shaft

 

you have factory front axle correct vacuum system on passenger side? possible shift fork not disengageing in axle housing causing front axle to stay engaged....even with tc in neutral...removing axles would not be turning internals...