because i want to replace the ones that are in there. the diffs in my truck haven't been takin care of over the years. so i'm completely going through and changing every bearing and seal. and i would like to have a little lower gears in them. peace of mind. but it won't be a daily driver. only to the the trail, on the trail and trailered whenever i can. i'll be selling my 3 other vehicles to get one good DD.
the main thing i want to know is if the 4.88's are any stronger or just stuff the 5.29 gears in?