Correcting My Speedometer - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 02-09-2007
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Correcting My Speedometer

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.
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Old 02-09-2007
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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..
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Old 02-09-2007
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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..
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Old 02-09-2007
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Quote:
Originally Posted by reallyflyguy
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.
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+.
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Old 02-16-2007
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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.
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