[gmonde]

my car weighs 3665 we me in it,i have two center sections 4:86 & 4:57 with 35 spline axles the 4:57 is a yukon 489 case with the stock caps i have 80 or so passes on it and and no troubles,pulled it and swaped to the 4:86 witch has the mark willams caps,this 60's around 1.60 but we had 1.589's this weekend ,like mentiomed the most important thing is to get rid of the stock spanners,the threads are to loose and somtimes will give way from the side load,the billet ones have more threads and are by far a tighter fit,also check your bolt lenght you might want to put in longer allen head bolts to get all of the threads , gmonde