Forgetful

I have a loud deep humming, droning nosie when I'm about 55mph and go full throttle. Also a little noise on coasting at these speeds. I've traced it down to the transfer case.

I'm wondering how easy it is to change out the rear bearing on a chain driven transfer case. I've seen the instuctions on here for the gear diven case but mine is the chain I believe? Is it just a matter of removing flange nut, flange, 5 bolts on the case and sliding out the bearing? I'm having a heck of a time just finding the bearing too.

97 manual trans SR5 V6



More info you you want to know---

I first tightened the flange nut on the transfer case some more and restaked- that reduced the nosie by 80% originally (now a 60% reduction after 300ish miles).

I'm thinking the rear output bearing in the T-case is bad. (I think the rear diff is okay becasue there is no play at all there)

New Driveshaft and U joints BTW.