I am getting a new motor for my T-Maxx...currently I have stock diffs and R/P and stock axles.

I already have the parts to upgrade my diffs (Kippster alum. diff cups and RRP gears) and have a full set of CVD's.

I am already in the middle of tear down to change arms. Should I go ahead and upgrade now, or put it back together the way it was and wait to see if things start to break??