The Mustang rear end has varied throughout the years. To better know these changes, check out LMR's guide on How To Determine A Mustang's Rear Axle Ratio.
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The Mustang rear end has varied throughout the years. Rear-axle gear ratios within the rear end are the same and have quite a bit of difference depending on the year or model you own. Knowing how to determine the rear axle ratio can be needed from a performance aspect and also speedometer correction.
Let’s get into detail on a few different ways to determine what gear you have in your Ford Mustang.
The first option will be going off of your factory specs for the model you own. We would like to note that this is not always 100% accurate, though. As many of us know, we all get the itch and modify our Mustangs. If you are not the vehicle’s original owner, someone could have made a gear change somewhere down the line. To find out more info on what gear your Mustang had from the factory, as well as everything you need to know about the rear end in general, check out our Rear End Gear Ratio and Axle Guide.If you have read through this article and are still not positive that you still have the factory gear, there is a tried and true way to figure this out. The method we have listed out below will allow you to do a quick visual determination of the gear equipped in your Mustang:
With this information at your disposal, determining your rear-end gears should be a breeze! Whether you have a 79 Pace Car or a brand new GT500, this will take out all guesswork. For more informative tech articles and Mustang content, keep it here with the real enthusiasts at LMR.com.