weird noise
 

ok i have an 85 4runner 22re that i just swaped a 5speed into... i put about 500 miles on it and tightend everything up... a couple hundred later its starting to make a rattleing noise when i hit 20mph and it gets worse as i go faster... nothing is lose and when you rev it nothing rattles...

my question is.... could it be the chain in the tcase thats doing it? or has anyone had this happen to them?