just did a zf6 swap in my OBS and now I have a zf5 that's taking up space. build date is 05/20/1996 and has 240,000mi. on it. gear ratio is 5.08 in first and fifth is .77. it'll need a rebuild as it common with these, the 2nd gear synchros are gone. the transfer case is a BW 4407. when I drained...