ok so this is mt first 4x4 so be nice plz! how to i put my 89 1500hd silverado into 4high and 4low i got it into 4 high once by luck, so i know it works but never into 4low whats the trick? ive heard you have to back up 30ft or some crazy shit like that. i just would like to know the prefered method before i break somthing. its a 700r4 auto trans 4x4 dont know what transfercase.