Im about to purchase the Warn Manual Hub Conversion, but I'm debating wether or not to get the 5 on 4.5 or the 5 on 5.5.
I know that 4.5 is 27 spline, so is my Dana 30, and the 5.5 is 30 spline. Im confused though if its talking about in the Hub or in the carrier. If its in the Hub would there be any other changes to make. Or if its in the carrier would I have to change my carrier to one that holds 30 splines or not?

I have a 1996 Cherokee classic and I am starting to build it up for off-roading. although most of its in good shape, im afraid the rear axle will not be able to handle on trails. Its a Chrysler 8.25", c-clip, non-ABS, 27-spline axleshafts, with 3.73:1 gear ratios. I am looking to upgarde it and possibly swap it for better. any advice for what to look for would be helpful.