Originally Posted by InvertChaos
I believe you can only use a programmer on a Rubicon or any JK. The OP has a TJ.
Originally Posted by Xverrowx
i did it to mine and i have a TJ Unlimited, its not a Rubicon.
All wranglers can use the programers to correct the speedo.
RUBICON MODELS...with the 241 transfer case do NOT have a speed gear but instead use a tone ring. To correct this you can only 1) use a programmer/eletric wire in calibration box. OR, 2) Have the computer reflashed/programmed to correct the speedo.
If you click the link in the 2nd post you will see that the gear swap is less than 5min job to complete and anyone can do it. You can also use a programmer.
The big differances....
Programmers can be pricey. But you can reset them for different tire size/gears.
Speedo gear swap ...not to Pricey but you will have to change it again "IF" you every change gears or tire size again.