Just retired added a 2023 red 2L Sahara Unlimited to my stable in transition from this state to sunshine in Az probably just outside Tucson by the end of summer. Have a quick question regarding diff and trans fluid and transfer case…I’ve watched vids that say you should plan on replacing existing bolts with new but that just sounds kinda crazy to me? Plus I checked mopar online it is $3.84 per hex nut…chances are I would never buy from them anyway after looking at other items…