vibration issue

[Ducter]

Well I am slowly getting my k5 back in shape, just got her not to long ago for a decent price, but now that I have replaced the tires, brake job, new plugs and wires, distributor cap and rotor, fuel filter, egr valve, oil and filter, cut out and replaced some spots in the floor pan, bed lined the floors, new motor for rear window, removed the blocks the po had for a lift in the front and rear along with new axle ubolts it's starting to drive half decent...

The tires were 33 inch mud tires,I have had them before and if you have them or driven with them you know the vibration you feel from the tread design while coming to a stop or slowing? That's what the truck feels like, only it's on AT tires now. Idle, motor is smooth, driving you feel the vibrations. Put it in neutral while driving and it smooths back out. I was thinking drive line related? Honestly about out of money at this point and don't want to start guessing. Anyone experience this before?

Thanks

 

[AV8TER]

A lot of rear blocks have a wedge shape to them. If you pulled a set like that your pinion angle is different now. I would check the pinion to t-case angles to see if there is a mismatch in angles.

 

[ryoken]

check your u-joints...

 

[Carcinogen]

check your u-joints...

X2

Just fixed the same problem on my dad's 89 3500. Thought it was the support bearing but when I pulled the drive line the u-joints fell apart.

 

[Ducter]

Alright, I'll check them tomorrow. Thanks