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Taller tires, speedometer

   
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Old 03-06-2013, 07:49 AM
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Taller tires, speedometer
How do I adjust the speedometer if I install taller tires? Can I get new gears for it or am I stuck with just guessing?
 
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Old 03-06-2013, 08:22 AM
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what truck?
91 and older the speedometer is calibrated by changing the gear on the end of the cable in the tailshaft of the trans.
92 and newer is done through the computer.
 
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Old 03-06-2013, 08:25 AM
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It's a 94 300 six 2x4 with a manual tranny.
 
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Old 03-06-2013, 08:51 AM
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that is done through the computer. if i remember correctly you can change tire size 4 times, then it locks onto the last change and you are stuck with that one.
 
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Old 03-06-2013, 08:52 AM
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Do a search for speedometer recalibration and it tells you how to do it. Its real easy. I just did it to mine.
 
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Old 03-06-2013, 08:59 AM
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Do I have to have any equipment to do it? I know I had to use a speedcal thing for a mustang I changed the gears in.
 
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Old 03-06-2013, 09:16 AM
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Originally Posted by tjc transport
that is done through the computer.
Not on this vintage truck.. it done directly at the speedometer by following this procedure...
HOW TO RECALIBRATE THE SPEEDOMETER ON 92-96 FORD F-SERIES AND BRONCO .: Articles
 
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