I just got a new 2014 Mustang with a 2.73 rear end and purchased a 3.31 gear set and pinion bearing. There are 2 Ford dealerships near me one that from personal experience I wouldn't poke with a sharp stick and the other about 40 miles away in a more rural area seems to have a good reputation for honest service. So I called the second Ford dealer and asked for a quote to install my gear set and re-set the speedometer and they just called back with a quote of 8 hours at $100 per hour and they would need it overnight for the sealant to dry. Every resource that I have found indicates that this should be a 3 to 4 hour maximum job. What have you guys and gals experienced having rear end gears installed time and price wise?