If you are installing a lunch box locker, that is one that replaces your side gears and spider gears but keeps the differential carrier, then you can do it your self, just follow the included instructions. You will not have to do the hard part which is to set you ring and pinion backlash as you are not changing the carrier or gears. I installed a pair of Torq-Rite lunchbox style lockers many years ago in a front and rear Dana 44, and I did not even have to remove the carrier. Also I switched to Starlink several months ago and absolutely love it. It is much faster, and much more stable than any of the old traditional satellite internet systems and has much lower latency due to the satellites being in much lower orbit.