I've got an 85 chevy 3/4 4x4 with a 208 transfer case. I took my transfer case apart and found that I had a shift fork broken. One fork was completely gone and the other fork was really worn. It had been popping into 4wd by itself for quite some time. Also I found a magnet in the bottom broken in a million pieces. Where does the magnet go? Does it just sit in the bottom of the case to collect metal shavings? Where is a good place to get the forks and magnet? How can I tell if I need to replace the chain as well?