2500 6.4 35 or 37 inch ire MPG

[pwjouster]

but you can tune your trans to hold the truck in 5th.

i guess my issue is the fact that 90% of my miles are highway speed.
what i dont want to do is sit at 2500RPM or more at 85 mph for an hour on end

 

[olyelr]

but you can tune your trans to hold the truck in 5th.

i guess my issue is the fact that 90% of my miles are highway speed.
what i dont want to do is sit at 2500RPM or more at 85 mph for an hour on end

Yea i understand where you are coming from. But 98% of my on road driving is on 55mph roads.

I can simply put the truck in 5th gear every time I get in it, too. But thats not what I want. I would like to essentially gain another gear down low instead of never using the high gear.

After driving my half ton ram with the 8 speed for the last 20k miles, it drives me buggy getting in the power wagon. Its pretty much my only complaint with the truck.

 

[Reuben]

Hell. I’m headed to Kansas to pick up my 18’ tilt trailer. My trucks going to feel like a beast with all that oxygen. I live at 7000 ft. Im going to gain like 120 hp! Lol you guys should try living with it at altitude. It’s not bad honestly. I don’t really notice. I set the cruise at 80 and I never even notice.

 

[McBroom]

My next set will be 37’s. I’m running 35’s now. I’ll also be doing a gear swap with the 37’s. I’m considering going with 4.88’s got 3.73’s now


I love my truck!
Blue Mule 18 Ram 4x4 C/C
Tradesman Power Wagon

 

[jokingjimmy]

The point of forums is to share knowledge, not just tell everyone when they ask a question to spend thousands, and if it doesn't work spend a couple more...

Actually we all know what forums are REALLY for. Food **** is for food forums. RAM **** is for RAM forums.

Oh and maybe some knowledge as well. I'm just saying...

 

[Richard Kim]

I have a '14 6.4 and had 2.5" level and 35x12.5 bfg mud terrains on and best I could get is 13.5. I put it back to stock and put my Firestone transforce HT tires on 275/70r18 and I average 14.5 now. 18 on the high way

Almost the exact same experience. 2016 5.7 on 2.5" level and 35" tires. 11-12 MPG city and 13-14 MPG highway (11-12 if I am 80 + MPH). I was getting 14-15 city and 17+ hwy on OEM ties / wheels.

 

[One Mile Up]

- 2017 2500 HEMI 6.4L
- Factory suspension
- Gears: 3.73's
- Tires: Toyo Open Country A/T III
- Size: LT285 /75 R18 (34.8")
- Speedo corrected(ish)

I live in Colorado (on average at 5,000ft)

I only run 91 octane

My average MPG around town is 9-11.