Question about 1990 Ford F150

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Gear ratio The tag on the back has these numbers : S814P 55 8 8 OC26. DONT UNDERSTAND. WHAT THE GEAR RATIO IS.

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  • eli wilson
    eli wilson Oct 14, 2013

    attached to a bolt on the hog head

  • Brad Brown Oct 14, 2013

    That is a 3.55 gear ratio


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On the back of what?

Posted on Oct 14, 2013

Testimonial: "Attached to a bolt on the back of hog head. Trying to find out what the gear ratio on my truck. I have a 1990 ford f150 5.0 lt. Xlt. Auto trans. There is no tag in door. And no vin. How do I find out."

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Posted on Jan 02, 2017

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SOURCE: 1996 F150 Gear ratio ID tag 5832 H or M 3188 6b05

Most auto parts stores can tell you from the tag which rear end you are using and the ratio

Posted on Apr 25, 2009

  • 54 Answers

SOURCE: rearend gear ratio and type of a 76 ford f250

Judging by those numbers, gear ratio is 3.31. You can test this theory, by blocking the front wheels and jack the rear end up enough to get the tires off the ground. Then mark one tire with chaulk for a reference and also the drive shaft. rotate the driveshaft one full revolution and the tire should make basically 3 and a third revolutions.

Posted on Jun 01, 2009

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