Ok i just got my ford racing ring and pinion 3.73 gears, didn't go with 4.10's because it was to much for me when i was watching the daily driving video so i think i will like my 3.73's anyways i need to kno i good shop around ann arbor MI. i got quoted at ford for 489 give or take a little they said. I feel that may be a little much. So if anyone knows of a good shop that is cheaper let me kno. thanks