Getting the right speed

[btm24]

Hey so now that I have my new front and rear axles almost in with a new gear ratio, what do I need to do to get my speedo to show the right speed? Also what will I need to do when I get 33" tires for it to show the righr speed? Thanks

 

specs: I have a, 4.0 I6, 1989, auto, old gear ratio 3:55, new will be 4:10, tire size as of now 31" ( with the speedo being off by 5mp...ish)

Thanks

 

Brandon

[mnkyboy]

I would wait till your done and see how far off it is,you changed gears but your also going with bigger tires so they will cancel each other out a bit.

[ComancheKid45]

Behold :D

 

http://gojeep.willyshotrod.com/HowtoSpeedoGears.htm

[btm24]

It may be a long wait untill I get the bigger tires but yeah thats true. And omg thank you! I have been looking for that post for months now thank you for getting it for me.

 

Brandon

[deziped]

When your ready to swap in the correct speedo drive gear here is a source for the gear you need and it's not to far from you. Ive always got quick service from them.

With the combo your going to run it looks like you might need the #37 white gear.

http://www.transmissioncenter.org/speed ... d_jeep.htm

[btm24]

OK thank you so much! ill keep that link in mind

 

Brandon

[87Warrior]

I would just recommend learning how much your speedometer is off and live it it until you get the 33's. My Rubi's speedo is 12% fast, when I set cruise at 80 it is actually going just a shade over 70.

 

With 4.10s and 33's my Rubi's speedo was right on the money :yes: