i will be replacing my 3in rough country which is starting to sag after 2 years hopfully with a 3.5 RE. i was wondering where i coud find out what type of t case i have and i think that i have a hp dana 30. i know that i have a 8.25 rear. right now i dont think that i have any vibes, but it is hard to tell since my 31s are rubbing in the back just while on the road right now. should i lift it and see where the vibes are or go a head and by shims and a t case drop now just in case, as soon as i can i will get a sye when i have the money. for a 3.5, what would be a good estimate on shims? also, is there any place that sells RE lifts with the shocks, or a place that sells good shocks cheap. right now i have RC shocks up front and rancho 9000s in the rear. for some reason, the ranchos would not fit in my friends 4.5 lift in the rear but the rough countrys did so we swaped. i know the rid will be harsh, but i was not sure if they will be long enough since i have heard that RE lifts usually net higher then advertised.