about how much HP can you put to the rear axle's before havin to move up to 31 splines? and whats a good diff to get?? was thinkin of an auburn.wanna know if i should upgrade the axles along with the diff at the same time.
If you're going to upgrade the differential unit, upgrade to 31 splines at the same time - why do the work twice. Might as well get the whole rear end up to the task.
I had the Auburn in mine with 31 spline Mosers. Might want to look into the Auburn Pro and an aluminum differential cover.
I'm gonna be running 550+ on 28 splines. But then just like another guy said earlier. It just depends on how much traction your getting. I'm not taking it to a strip and not trying to "hook up" just a fun burnout car ha. But if your serious about going to the strip with high hp #'s, then you should do the upgrade to 31's regardless!