Drivetrain noise

[Nomadster]

I have a 97 Ranger XLT 4x4 4l 5 spd . Initially i had a vibration in my truck , which turned out to be the drive shaft ( 2 piece ) replaced u-joint a steady bearings to no avail...so i then read on here about all the problems with 2 piece drive shafts and the recommendations to go 1 piece...so i did that & it got rid of my vibration but now my 4wd leaver on the floor vibrates like heck ( noisy )& it didn't do this before , the vibration ( noise ) seems at it's worst at around 80 km's an hour when in 5th gear as you increase speed it goes away .??
Anyone having any ideas i could sure use some help .
Tks D.