great day!!!!

[us111]

hi all,,well it's one of those good day,bad day thing's..got my 76 k-10 stepper out of garage for the FIRST time in 2 years,lotta motor work etc..make a long story short went about 30 miles and it sounded like someone thru a metal sledge hammer in a wood chipper is the only way to describe it.thought motor came apart but didn't..got it to side of interstate and she won't move so it's either tranny or transfer case.question i got is there an easier way to figure out which it is beside's the obvious tearing them out??? it's got the TH350 tranny with the part time 203 transfer case..everything had new oil and fluid it them,,ran the transfer case in gear for awhile to oil it,,,never even got a chance to see what it would do!!! lol..thanks for any help...