Ok,I just got this truck a few months back.Haven't had a chance to take it off road thank goodness.Well tonight I wanted to fool around and test the transfer case(BW1356 in a early 87 F150) to see if it was making any strange noises in reverse.With my hubs not locked in(FREE) I stuck it into 4H and put the tranny in reverse.Heard a loud CRACK and the truck jumped.I put it back into 2W.Well,while I was leaving the parking lot(was at walfart BTW) I heard a very faint thump thump thump from under the truck.Got home and had my cousin look under while I drove by in 2W and he said the front drive shaft was turning.So I tested it again in 4H and N.Didn't make any noise this time.Tried 4L but it wouldn't go.Felt like it would bottom out and you could hear gears barely touching(very slight grinding noise like a tranny without syncronizers).Anyone have any ideas what could be wrong other than bent linkage(I hope thats what it is)?Also got under it a few minutes ago and could spin the front drive shaft freely except for a 1/8-1/4 turn spot.Would hang up.I could turn it though the spot but took some force.Not a sudden hard grab.Feels like something is bend and it it binding up.This was with the truck off,in Park and transfer shifter in 2H.