anyone out there know which 4 hi selection is which on the np 242? first, or course, is 2 hi. Then you got the first 4hi selection. Next one down is the second 4hi selection, followed by neutral and 4low. I've been told that one of the selections is regular 4hi and the other is a part time 4 hi? is this supposed to act more like the viscous coupling on all wheel drive systems? at any rate, if anyone knows which selection is which and what the differences are, please let me know. thanks.