hey guys I'm looking got trade my 2003 7.3l for a 2015 4 door 6.7 the only thing that worries me is the rear end, I have a camper that is about 14,000 lbs but I do not pull it that much....do you all think the 3.55 will be ok? or should I hold out for a 3.73
thanks for the input, if I can get the price right I might just go for it its n FX 4 with several options…....do you all have any recommended Tuners or would you just leave it alone?
3:31 or 3:55, if it is a 350 or has the 20" wheels most likely it has the 3:55 gears. the gas engines came with 3:73 or you could order 4:30, my buddy waited 3 months for his 6.2 with 4:30 gears....now he wishes he bought a 6.7 with 3:55
BTW...you put this under the 2017 category, might get better response under the 2011-2016, 2017 has different gearing in some models.
Try it stock for the first 6 months to have a base line. Stock is setup up for how most drivers use their trucks. 14000 lbs is nothing for these new engines to pull.
so you would not recommend any tunes? I was hoping to at least get it tuned out of using the def fluid if that is even possible, my current 7.3l has a turner from DP tuner but wasn’t for sure (when the time comes) if anybody had any other ideas for tuners or what was recommended
I cant help you with the modding, my previous 2011 had over 110k miles and was bone stock never had an issue. my current truck has 100k mile warranty and will remain stock also. Def isn't expensive about 4 gallons every 5k miles or oil change.
yes in 2017, the OP asked about a 2015, 2017 the axles are different also. Which is why I commented that he would have better answers asking under the 2011-2016 section of the 6.7 forums.
I found a truck I want. Has all the options but only has a 3:31 gear I plan on getting a 5th wheel soon. I haven't changed a ring and pinion in 25 years. I think I may just get the truck and change gears later. Is it a big expense?
I have an 11" f350, 3.31 and 20's. pulls equipment everyday 26-30k gross no problems. I deleted it and I am running 60 hp setting, I didn't notice much difference, maybe 1,5-2 mpg. I had 155k on mine and needed a def heater and some sensors, it was a wash on fixing def system or deleting. that was a simple choice! We have 7.3 450 and 550 with 6 sp manuals, 4.88's, 60 hp programs and bigger injectors. They will run with the 6.7, get almost as good mileage, but 6.7 has power all the time and the auto is flat out amazing. Any 6.7 will pull whatever (within reason) you want comfortably and have plenty of power
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