Today I loaded 5 adults in the truck (1996 supercab) and headed to a bbq. We immediately noticed a strange vibration. It doesn't matter if the truck is in drive or park or any gear for that matter. After we got home I crawled under it to see if anything was hitting the transfer case because that is where it was most felt (under the feet of my back seat passengers) I noticed only about 1/2 in. of space between the body and the top of the t-case. Could that have caused this issue? And has anyone here ever experienced this?