35" Tires Can Ruin My Tranny? - Ford Powerstroke Diesel Forum
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Old 06-13-2013, 09:46 PM
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Post 35" Tires Can Ruin My Tranny?

Hi, pretty new here, and one week into ownership of a '01 F350 CC 4x4 PSD with 173,000 mi. I scour the internet for maint/repair vids to help me save money, and I've found some great videos on YouTube. A particular PSD mechanic in GA, has many helpful videos, and from what I can tell, he knows his business, but to my question: He claims that running big tires w/o re-gearing will ruin your transmission, and also shorten the life of the hub bearings on a 4x4. I am running a 4" lift with 35x12.50R16.5, All-Terrain T/A KO. Are these considered over-sized tires, and should I be concerned that they will wear my equipment out prematurely even if I service it properly? Much obliged for any thoughts.
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Old 06-13-2013, 09:57 PM
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You are fine... nothing to worry about
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Old 06-13-2013, 09:59 PM
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I would say 35's will put a little more strain on the tranny and your brakes. But you shouldn't have anything to worry about. It also really depends on how you drive it and if you tow real heavy loads. But I wouldn't be really concerned about all of that unless you go up to 37's or bigger.

So in a nut shell you should be fine and have nothing to worry about.
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Old 06-13-2013, 10:06 PM
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Not pulling heavy loads, and I drive all my rigs pretty easy...hot-rodding stayed behind with my youth
Thanks for the replies, I feel easier about it already!
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Old 06-13-2013, 10:10 PM
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You should have no worries for sure then
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Old 06-13-2013, 11:05 PM
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The weakest point of the good old 7.3's was/is the tranny. If you drive it like a bat out of hell all the time, and tow more then you should, your tranny life will be shortened. And that is shortened even more with larger diameter tires, as you are adding more stress.

From the stock 32ish tires, to 35's isn't that big of a jump though... So IMO treat your truck right, and you will be fine.
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Old 06-14-2013, 12:33 PM
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obliged!!
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