Speedo fix due to gear change

**04mustang232** · 06-23-2007, 01:17 PM

i have an 04 v6 stang and im putting in 4:10's. Does anyone know if there is any other way to fix your speedo without needing to buy a $400 programmer?? thanks alot

**stieny** · 06-23-2007, 01:41 PM

Originally Posted by 04mustang232

i have an 04 v6 stang and im putting in 4:10's. Does anyone know if there is any other way to fix your speedo without needing to buy a $400 programmer?? thanks alot

I had a speed cal in my old GT that worked perfectly. They are made by Dallas Mustangs I believe. I bought mine from LMM from Lou. Not sure if they would work on the 6's but they probably would. It worked fine on my T45 and fine on Tom's T5 so they are pretty universal. They're like 70 or 80 bucks and just plug inline with the speed sensor in the tranny. Then you flip a few switches in box to calibrate it to your new gears, ground it and run a 12v source and you're done. Best way to do it without a tune or a handheld.