I've tried everything to get rid of this vibration. I had the death wobble and I put new tires and rims on and now I have the vibration. Ive replaced almost everything in the front end except the front end itself to try to get rid of it. before I got the wobble I put new yolk in the rear, new u joints, new rear leaf springs and shackles. I have no idea what it could be, anyone got any ideas?

could be something as simple as an out of balance tire

What exactly have you checked/replaced? Tie rod, track bar, drag link, ball joints, axle u-joints? Are you lifted? Adjustable control arms? Have you had an alignment done? Need as much detail as you can give...

^^^ THIS

We need to know everything about your jeep to start figuring this out.

So you tried to fix your DW and put new tires on and now you have a vibration. So you didn't have it before the tires? What tires did you put on.

I have a 1994 jeep cherokee with a 3 inch lift, 265/75/r15s. i have put new rims and tires, ahd them balanced, new rotors, brakes, control arms, new rear yolk, new u joints, new steering shock, almost everything on the front is new but the axle it self. i dropped the rear drive shaft today and drove it up to 45 where the vibration started and without the rear driveshaft, there was no vibration, shake or anything. could that be the new yolk not put in right, driveshaft bent or driveshaft weight was thrown or something.
im taking it to the shop tomorrow to see if its the drive shaft or the yolk that is causing this. im thinking with the yolk still being in it and it not vibrating its the driveshaft, but idk?

I had a shake until i put the new tires on and i put firestone destination les on it with the same rims i had on before.

Why did you replace the yoke on the rear pinion, did the u-joint let loose, is the driveshaft beat to @#$%?

No, i had it in the shop a little while ago, i snapped my rear leaf spring and the rear driveshaft u joint, i got everything fixed and the garage stripped on of the bolt holes out and stuck a regular bolt instead of a case hardened bolt. when another garage was checking something else out, they backed it off the lift and the rear ujoint snapped off so they replaced the u joint and yolk

Does the u-joint use snap rings to locate it are they in place and are the caps snug in the straps? Your sure the rear drive shaft isn't tweeked?

yes it does external, yes the caps are snug and what do you mean tweeked?

Do you have a bent shaft ? I just put in a junk yard shaft when I did my 8.25 swap and now I have a vibration only in 3rd and 5th gear at 1700-2k my shaft has a dent on it. Check yours

I'm taking the driveshaft to a shop that specializes in driveshafts and things and hes gonna put it on the machine and see if its it or the u joints are messed up.

I figured out its not the driveshaft. i put a whole new driveshaft in and still have the vibration. i am out of options and have no idea what else it could be.

Have you tried a spare set of tires or tightening the flywheel