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F-350 vs F-450/550
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<blockquote data-quote="dennishoddy" data-source="post: 3572406" data-attributes="member: 5412"><p>Your correct. There is a lot more to towing capacity than gearing although that is an important factor in standard transmissions vs automatics. </p><p></p><p>As an example, My 2020 has a 10 speed auto. I can select towing or econo as well as three other selections, but keeping it to towing. </p><p>With a standard, you get what you get. RPM at 70 MPH is going to be what the gearing is. 4:30 is going to result in higher rpm vs a 3:65. The 3:65 is going to reduce the load you can tow. (there is a calculation to determine this) With the 10 speed auto, you get the same RPM as a 3:56 gearing in 10th gear because the computer tells it how to work on the higher end like 6 through 10th gear. The lower gear ratio gets you off the stop light quicker and up to speed quicker. My cousins 2020 has the 3:65 gearing. We have the same 10th gear RPM when not towing at a set speed so it's the same mileage no matter what gearing is. </p><p>He is not rated as high as I am for towing.</p></blockquote><p></p>
[QUOTE="dennishoddy, post: 3572406, member: 5412"] Your correct. There is a lot more to towing capacity than gearing although that is an important factor in standard transmissions vs automatics. As an example, My 2020 has a 10 speed auto. I can select towing or econo as well as three other selections, but keeping it to towing. With a standard, you get what you get. RPM at 70 MPH is going to be what the gearing is. 4:30 is going to result in higher rpm vs a 3:65. The 3:65 is going to reduce the load you can tow. (there is a calculation to determine this) With the 10 speed auto, you get the same RPM as a 3:56 gearing in 10th gear because the computer tells it how to work on the higher end like 6 through 10th gear. The lower gear ratio gets you off the stop light quicker and up to speed quicker. My cousins 2020 has the 3:65 gearing. We have the same 10th gear RPM when not towing at a set speed so it's the same mileage no matter what gearing is. He is not rated as high as I am for towing. [/QUOTE]
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