ok guys. so im thinkin bout puttin 3.73 w/ a t-lok in my stang. will i need to recalibrate the speedo or nething like that. i dont think i will but j/w????

 

yes you will have to recal your speedo becuase your going with different gear settings which mean your tires spin faster and the stock speedo reader will not register. Easy fix, get a chip that has 3.73 gears in the program and problem fixed.

 

http://www.brothersperformance.com/s...ospeedcal.html
This is just for manuels though. You could also get one form here:
www.dallasmustang.com

 

thanz for the help. it looks like that first one is only good through 02. so idk bout that one.