i just had a jeep grand cherokee in my garage that had a problem like that but my problem was linked to someone putting a rear in the front with the wrong gear ratio. also the constant velocity CV joint on the one front axle went south.
I switched out the cv joint axle for a U-joint style i had laying around and replaced the ring and pinion in the rear and it works great.

does your vibration feel like its coming from a specific corner of the vehicle is so have a look at the axle if its from the front

 

I have no computer piklesmoocher

 

tjats wat u look like to huh! I. Dint come her for ******* oeople I came here for help

 

finally. Someone. That wants to help well it sounds more towards. The rear differential is at a angle or cocked up. I haven't had issues. Until my driveshaft fell ot and my rear went towards the hatch so I had to replace ujoints and wrestle with leafsprings and shocks hope that u understand :-)

 

if u had to pry the rear to make the new driveshaft fit u will need a different drive shaft. when u put a drive shaft in u should be able to slide it front far enough to have at least a half inch of clearance between the u joint and the coupler on the rear then it should be able to be slide back into the coupler. so i would find a shorter driveshaft. go at least an inch shorter

 

also did u correctly repair the the rear problem yet cause that will be an issue also

 

I'm new to. It but I never had a problem. Outt of it till I put secondary shackles. On front part of leafs also they turn bk and pushed it all bk I. Got everything. Hooked. Back up just vibration. Issues. And I can move tranny and motor. With my hands

A inch side to side but it has always. Been. That way I had the same lift a month ago and could do a hundred. With no issues I'm almost. Scared. To off-road. Anymore and I nvr get passed 2 grand rpms in the slop so I dunno

 

I also don't kno wat I need to do

 

if u can move the motor and trans that far by hand i would advise to replace the transmission mount and go from there

 

The mount. Itself. Is fine missing. The two bolts that go into the tran I can't literally. Pick it up anmove it but the mount. Itself. Is good no cracks in it nothing. And I have a automatic. Shiftwler question. Can u reuse one from the bone yard? And how do u straightn the rear chunk where its perfectly. Straight. And is it normal for. Humming. In 4wd high on accel and decell

 

whether its normal or not idk but every jeep i have ever driven makes like a whining noise when u put it in four wheel

 

wait what part are u talking about getting from the boneyard i didnt hear you clearly

 

The bolts that mount the tranny mount to the tranny

 

would you happen to have gotten new tires????

 

No new tires I got the dw ugh to