Spedometers

[jakbob]

so i heard since im putting 31's on my xj that i will need to recalibrate my spedometer...i would like to know how if i can do it myself...

 

[Bounty__Hunter]

Simply remove the speed sensor from the rear output housing of the transfer case. Then change the speedo gear for one with the correct tooth count for your tire size and axle gear ratio.

http://go.jeep-xj.info/HowtoSpeedoGears.htm
http://www.stu-offroad.com/engine/speedo/speed1.htm