Question about 1992 Ford F250

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My speedo is off by 5 mph need help?

I have a 1990 ford f250 with a (460 ci) 7.5l engine and my tires are a different size than factory. i was wondering if i can use a super lift truspeed calibrator on my tranny or do i have to use something else?

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Your speedo will be incorrect due to the tyre size change unless you have changed the wheel size as well.

Posted on Aug 02, 2009

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