heres the story. started feeling a vibration in the rear a few weeks ago. it got worse, did some research said it was axles. replaced axles (ordered through rockauto.com) got an alignment right after but theres still a little bit of vib. in the rear. i put new slotted and dimpled EBC rotors and Hawk blue pads on 2 months prior to axles and no vib then... its not motor, not trans and not drive line. dont seem to be diff, its not making any funnys sounds or any play in it. the only thing i can think of is getting drive shaft spacers. but i can find any GOOD info using the search. the vib only happends randomly between 40 and 50/55 then goes away. i am very confused... does anyone have any imput? anything to start looking at next would help.
Thanks

 

tires balanced properly?. what axles? possible they are out of balance or rebuilt poorly. accel or decel, cruising?

Assuming your inboard joints are remanufactered properly, drive shaft spacers wotn help you.

 

You should have just swapped the buckets side to side on the original axles.

If there's info that says replace axles for a vibration then please link us to it, because it is not the right choice. The oem axles are the way to go.

 

Could also be a simple tire issue.

 

I agree, I put my car up on a lift at a buddy's shop when I was getting some severe vibration in the rear of my car. I expected the worst but after inspecting everything, we couldn't find a problem. Eventually we found a severely disfigured tire in the back (I had just installed it ~5k miles ago!). Replaced the tire and everything is smooth as silk.

 

after i instaled new axles i had it ballenced and there was play in my axles(i have 134,xxx) tires might be the issue. but my question is why would this only happen between 40 & 55 MPH? every where eles feels very smooth. there is a "poping" in the rear after alxes were instaled. i read its axle nuts. but there TQ'ed to spec. i am still very confused