it depends on how good of a installer they are.. i can R&R yota diffs ( front and rear) in about 3-4 hours.. and we charged a 100 dollar flat rate ( 100 bucks if it takes us 10 mins or 3 hours) for the gear install ( does not include labor involving tearing down axles and whatever else may have needed to be done) so it all depends on who you take it to
