So I just put a set of 32x12.5" tires on my truck today. My speedo is way out! Is it hard to correct this or do I need to take my tranny apart to change a gear?? I have a 94 2.3 with a 5 speed.

 

haha nah...take off your cover on the guages get up to highway speeds beside a buddy and stick the bastard back on! lol easiest way to do it thats how i fixed mine! or buy a tuner..

 

theres calculators so you can figure it out..what i did was found out the speeds for the ones i used the most and just went..

 

1994 Rangers have an interchangeable gear at the speed sensor on the transmission that can be used to adjust for tire and axle ratio changes. You cannot fix it with a flash tuner because the PCM is not involved with the speed adjustment. That only works for 2001+.

 

just calculate it...
(new tire size)/(old tire size)=New Ratio
get that new ratio and multiply it by the speed.

ex. mine 33/27=1.22
1.22x60=73.2

i quite sure that works.