You realize the ARB replaces the differential carrier, correct? You’ll need to remove the ring gear from old carrier, reinstall onto the ARB, and re-setup your ring and pinion. Just want to make sure you understand whats involved with the “install”
It wont affect normal driving because you should unlock your hubs. I would only use this configuration on rig that sees 4wd primarily on the trail rig. When youre on a budget, its probably almost a $2k difference in costs from and ARB to an autolocker given the installation costs of the ARB.