Question about 2004 Ford Explorer

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My diagnostic codes read P1635. That says tire/axle ration out of acceptable range. But what does really mean?

Car runs fine and alignment is OK. This just popped up about 300 miles ago. The SUV has 85000 on it.

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Posted on Jan 02, 2017

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SOURCE: 2006 Ford Explorer

The 1st thing you do is have the system tested for the trouble codes that are turning the lights on, I doubt the 2 are related from past experience. Kragen auto and others do this test for free, post the codes back here and I will help you get this fixed

Posted on Dec 08, 2008

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SOURCE: I recently replaced Michelin tires

the main thing is that you know how much difference is what the speedometer is reading & what your actual speed is, because you have gone from a 65 down to 60 tyre the rolling diameter is smaller therefor there will be a difference so therefor the speedometer is reading faster than you are actually going hence more fuel used over the same distance.....hope this helps......cheers.

Posted on Sep 13, 2011

Testimonial: "Thanks. Yes, this is helpful. I do not have to worried about potential damages to the truck overall drivability. Nxt time I will buy actual size. "

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