grinding noise in trans are inder a load.. help please.

Im having a loud bearing like growl when the vehicle reaches about 30 mph...or i should say most noticeable at 30 mph, it will go away when i decelerate and continue under throtle, Ive yet to inspect transfer case oil level but trans level is ok. Any clues on what to inspect, i read online about a tsb from mitsubishi about the transfer case bearing failure from low fluid level. Anyways any input will be helpful hanks. 92 gvr4

 

[Noobsauce]

Check the t case, also check the drive shaft support bearings.