[Shabnasty]

Please help me figure out what the cheapest and best way to recal my speedometer is. I recently switched from stock gears to 373's. From my understanding you cant just switch out the speedo gear anymore. Please help me!

 

[2002stangGT]

If it's a 5spd you have at least 3 choices:
1. Speed Cal http://www.brothersperformance.com/shop/mustang/brospeedcal.html
2. Chip
3. Hypertech Programmer

If it's an Automatic you can't do the Speed Cal but can do the other 2 (chip or Hypertec). Speed Cals currently do not work on 99+ Automatics.

I now have 4.10s with a jacked up Speedo and Odo until I get my chip. I'm getting the Tweecer RT chip.