Low speed (5mph) vibes! What?!?!

Alright, this is odd. I know a lot of people get high speeds vibes, but I am having something different.

I get a pretty bad vibration that rattles the backseat and hatch at like 2-5 mph! It goes away after that, but then I get a slight resonance around 65mph. The high speed was bad, but I rebalanced the tires and it took care of 95% of it.

What could cause such a slow speed vibration??

6" lift
31's (slightly cupped)
SYE/front DS
6 degree shims
D44 rear

Any ideas???

(Yes, I searched, but couldn't find ANYTHING about low speed vibes!)

what kind of tires are you running? could be the lugs yur feelin'.

I bet it has to do with the slightly cupped 31s. Unless you have Baja Claws or Boggers then its normal

You wouldn't think that you would feel anything. My mud terrains feel choppy going real slow on pavement, feel it mostly when coming to a red light

My Procomp X-terrains (baja claws) did that in the driveway

Something that you can feel at walking speed has to be pretty severe. My first thought is to check the lug nuts and spindle nuts.