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So the truck I bought had the 3.31's and after the 37's it obviously is geared way too tall. Was wondering if anyone has regeared a 17 yet? What ratio should I do, approx cost, any other tips? Would appreciate the input or any shop recommendations in central CA.
4.30's should give you about 1700 rpm at 65mph and help get things moving quickly in town. I don't know if 4.10's would be enough when towing but it would drop you another 100rpm or so.
So the truck I bought had the 3.31's and after the 37's it obviously is geared way too tall. Was wondering if anyone has regeared a 17 yet? What ratio should I do, approx cost, any other tips? Would appreciate the input or any shop recommendations in central CA.
2017 6.7L CCSB
These 6.7 trucks make a lot of power and the 6 speed auto offers great gear spacing. I would go with 4.10.
I've researched it some. It is expensive. I have 3:55. But with 35s it's like having a 3:31. I was thinking of doing 3:73 would be like 3:55 after tires. I have a 44ft rv so I don't know how 3:31 will go. I decided to keep stock wheels and tires and slap them on when hauling the rv. Obvislulsy a hassle. 4:10 if you have 37s should be close to 3:55
So the truck I bought had the 3.31's and after the 37's it obviously is geared way too tall. Was wondering if anyone has regeared a 17 yet? What ratio should I do, approx cost, any other tips? Would appreciate the input or any shop recommendations in central CA.
2017 6.7L CCSB
I also have 3.31 gear and also plan on running 37" so I'm in the same boat. I'm toying with the idea of using the stock 20" rim's / tires for towing the RV and having the 37" as my around town shoes. Yes, I swapped the the original 18" rims / tires for the 20", just like the look better.
A quick look at ford parts site shows that the front Ring and pinion is ~$180 and the rear is ~170, course this depends on which rear end you have, the Dana 275 and 300 are a little more.
While I have not made the swap yet, I have setup ring and pinions on several of my other trucks. Should just be a lazy Saturday job, if you have the tools.
After the swapped you just update the computer to the new gear ratio with Forscan.
Thanks bringing this up, forced me to look up the part numbers and realize that parts were not as expensive as I was thinking.
Now if you have to pay someone you talking at least $1000+ in labor, could be more (lot's more) depending on the shop. Just make sure they know how to setup gears.
My business purchased a '17 450 back in December. I liked everything except the high speed Interstate driving, thought the engine wound too much, lost mileage and got out of the sweet spot too far.
So for my personal truck, I was going to have my dealer re-gear the pumpkin "if" I went with a F450; as I wanted 3.55 (or close to it). Dealer talked me out of it and just said order the 350 w the correct gearing you want. Always, I've always wondered if this was b/c it was a PITA to swap-out or what? He never gave me a real answer either. hmmm
My business purchased a '17 450 back in December. I liked everything except the high speed Interstate driving, thought the engine wound too much, lost mileage and got out of the sweet spot too far.
So for my personal truck, I was going to have my dealer re-gear the pumpkin "if" I went with a F450; as I wanted 3.55 (or close to it). Dealer talked me out of it and just said order the 350 w the correct gearing you want. Always, I've always wondered if this was b/c it was a PITA to swap-out or what? He never gave me a real answer either. hmmm
Gearing lives matter! lol!
I've done plenty of gear swaps and with non removable thirds it is a lot of labour. I can't imagine what the case spreader looks like for a M300 or 110.
This is a $3000 job where I live in Canada.
Picking the right gears is so important I often wonder why the dealers don't explain this to customers in more detail.
There is a reason Ford moves the gearing to 3.55 with 20 inch wheels.
I've done plenty of gear swaps and with non removable thirds it is a lot of labour. I can't imagine what the case spreader looks like for a M300 or 110.
This is a $3000 job where I live in Canada.
Picking the right gears is so important I often wonder why the dealers don't explain this to customers in more detail.
There is a reason Ford moves the gearing to 3.55 with 20 inch wheels.
Thank you. So it was mainly the 'cost factor' as why my dealer nixed my re-gearing F450 idea.
I really like the 4.30 gears in my F450. The short gears make it feel snappy, minimize downshifting when towing, and don't seem to hurt my mileage. I'm actually getting better mileage than I've seen anyone with the 3.55 F350 DRW get (and the 450 weighs 500# more).
Note that I normally get 15.5 or so. The tank above was a little better than average, but shows why I enjoy my 4.30 gears.
It's really too bad Ford took away the 3.73. Those really were the sweet spot for anyone running a 35, which so many do. If I was going to only run 37's with no chance of going to a 35, I would likely choose 4.10.
Thank you. So it was mainly the 'cost factor' as why my dealer nixed my re-gearing F450 idea.
It was good advice. The step up to the 450, plus the cost of regearing doesn't make much sense money wise.
I'm a big fan of deep gears and where I live the highway speeds are 65mph, and slower on the grids. Maybe if I lived in the land of 80mph interstates I'd want something less busy. The 4.30's work well for me and I like this option.
I think the biggest mistake made when going to oversize tires is using the final cruise rpm when deciding on gears. The .67 6th may give you some lazy 1200 rpm with 37's but it is the gears in front that make the difference when pulling. An owner needs to figure out what speed they drive up certain hills or conditions and plan to have 4th or 5th at the optimal rpm for making power. Building lots of boost at lower rpm won't provide the hp needed and isn't ideal for longevity of any motor.
I really like the 4.30 gears in my F450. The short gears make it feel snappy, minimize downshifting when towing, and don't seem to hurt my mileage. I'm actually getting better mileage than I've seen anyone with the 3.55 F350 DRW get (and the 450 weighs 500# more).
Note that I normally get 15.5 or so. The tank above was a little better than average, but shows why I enjoy my 4.30 gears.
You're (only) fooling yourself! No serious. Unless your name is Gordon Lightfoot, or maybe you always have tailwinds vs. my headwinds. It ain't ever happening period. And this coming from a dual owner of both trucks. My personal F350 averages 17 unloaded and with my heavy (sometimes) foot. My business F450 is at about 3mpg under this at around 14ish. Granted, if you never do high speed Interstates, the difference is very minimal.
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