Putting in new gear on 2002 tundra what else while in there?

#1
Going with EcGS gears and getting install done.. while having truck torn apart, is there anything you would recommend changing or servicing while torn down? Seals? Upgrades?

Thanks Zach
 

bkg

Explorer
#3
Flush brake lines (you'll have to disconnect the rear, most likely, to get the axles out far enough to pull the diff).
check lines to front diff disconnect
Check the condition of the CV.
Brakes