speedometer calibration
 

I've got an 86 GMC 3/4 ton. It originally came with 7.50x16 tires (I think). I am currently running 245x75 tires, which are a lot shorter. Is there any way of calibrating my speedometer to compensate for the shorter tires?

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69 GMC 3/4 ton camper special(long term project)
85 GMC 3/4 ton (daily driver)

old_truck1969,

Go to the TCI web page below.
http://www.tciauto.com/tech_info/speedo_gears.htm

They give you all the gear info you need.

Better yet try this web page.
http://www.chevytalk.com/tech/transm...calibrate.html


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Gerardo
1983 Custom Truck
TX Plates: "BAD BOW"
[URL=http://www.geocities.com/abetterchemist/]http://www.geocities.com/abetterchemist/</A>


[This message has been edited by gchemist (edited 04-13-2001).]

Thanks, this really helped a lot

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69 GMC 3/4 ton camper special(long term project)
86 GMC 3/4 ton (daily driver)