Vibration after 6 inch lift install

[benscharlotte21]

Hey just hoping to tap a few greater minds here:

Just installed a 6 inch lift in my 87 2500, with no issue EXCEPT for the fact that my rear end vibrates like a bastard. I thought it would be the new 37 inch tires i have but I balanced them and its still there. Maybe even worse actually. Also quick side note I recently replaced my wheel seal and it is leaking again due to this. As of now the left side seems to be what is vibrating regardless of which tire I run there.

Thanks

 

[John81287]

Pinion angle is my first thought!


Sent from somewhere in Northern Illinois!

 

[benscharlotte21]

could it maybe be a warped rotor on the front left? Though if it was a problem with the front id think it would be screwing with my steering. Just a thought since we hammered the piss out of the steering arm and heated it up as well

 

[benscharlotte21]

And John, My pinion is actually pretty square to the drive shaft so unfortunately probably not the issue

 

[bucket]

Is it a vibration or a shake? At what speeds?

Your leaking seal is probably another issue. Like a groove in the axle or a worn bearing with slop in it.

 

[benscharlotte21]

It's a shake. Basically the truck is going up and down as I drive. I feel like I'm on a miniature bucking bronco.

 

[hirschdalechevy]

At what speeds ? Your shake sounds pretty bad , maybe you should have a friend watch you drive by and maybe he will be able to see something. I have had vibrations after lift's but what you have going on sounds different. Do you have a 208 case ? if so you should drop that as well. Your rear pinion should not be rolled up in line with your drive shaft either , (can cause vibration's). Anyway vibration's you can chase out but what you are saying sounds like broken part's to me. You better get a jack and go to all four corner's and see if there is any movement anywhere and so on , (check everything). You say you can't feel anything in the steering ?

 

[benscharlotte21]

Its a bent rim. Probably also why the tire took 19 ounces to balance lol

 

[bucket]

What kind of tires? They aren't bias ply Swampers are they?

Nevermind, not sure how I didn't see the last post.

 

[benscharlotte21]

Could my right helper spring being on upside down be the cause? Ive still not mounted the new rims cuz I have to take it to a shop. I'm going to go switch the spring tonight or tomorrow night Im just curious on peoples opinions