go through the usual... rear driveline, front drive shaft, t-case rear bearing u-joints. a worn out diff will vibrate. mud/snow/ice in the rim, loose lugnuts. bad motor/tranny mounts. slip yoke/s if equiped. bad/leaking/worn shocks(this will also result in uneven tire tread wear) uhm.... if youve never had oversize tires u wont be used how they feel. you really should provide more info..... theres a million and half things that can vibrate... where it is, how it sounds, where it seems like its coming from. what kind of driving brings it on. i guess i couldve just said NEED MORE INFO.
hey you computer programmers.... someone needs to make a simple if>then
program that will narrow down vibrations, it wouldn't be hard and it would be cool!
patent pending.... jk.