I am regearing to used 4.10s from 3.21. Should I use the installation kit or the overhaul kit when making this change. The installation kits are around $200 and the overhaul kits are around $300. My mechanic (off road shop) has performs regears often, but has yet to work on the JK. Please let me know if you guys have gone through this or have recommendations.

 

I often wonder the same thing - i cant help you but i'll bump it to the top so someone might