Ram04
Member
I've read about 100 threads on 4:10 vs 4:56, 4:56 best all round gear period ect ect.
Couple things that don't quite add up to me;
Many say the sweet spot for mph with the 5.7 Hemi is 2000-2100rpm on hwy. I have found that 1700 is where my truck gets best hwy mpg (18-20 on a calm day)
This was with the smaller 245/17's and 3:55 gears.
I have since switched up to 275/20's and have just gone through a winter and wasn't as bad as expected, but definitely under geared. Specially driving around town.
After everything I've read, I am 90% convinced I should go with 4:10's, however, so many swear by 4:56 that I'm torn.
Add to that the place I called to do the job said the exact same thing; "Go with the 4:56, you will get better mpg even on hwy."
Now, I live in the prairies, so not much for hills ect. I could see if I lived around hilly terrain that 4:56 would be the way to go.
If I lived in the city and did 70+% of my driving there I could see 4:56 would be the gear to get.
But I live outside of town and probably do 70% hwy driving, although never over 70mph. Usually 60-65.
I do plan on doing some engine mods and I could see where a set of headers could change your sweet spot depending on what set you went with. (raise it in rpm if pipes are too large to retain bottom end tq)
The 04 Ram has always gotten very good mpg compared to most Ram owners I talk to, and I now contribute that to driving habits as well as the fact I had the smaller 245 tires which made the 3:55 gears a little better.
Still, while I can get great mpg on a calm day, any cross or head wind and the truck loses more mpg than any other vehicle I have driven.
This makes me think that maybe I could have done better with the same 245 tires and 3:92? (not as effected by strong winds/ elevation changes?)
Anyone out there running that combo and getting great mpg?
So when I originally did the calculation last fall, 3:88 was the gear that would put me right back to where I was with the 245's and 3:55 gears. So that would be the 3:92's.
I am turning larger heavier meats though, so that says 4:10 to me.
But everyone swears by the 4:56's!
Help!
Couple things that don't quite add up to me;
Many say the sweet spot for mph with the 5.7 Hemi is 2000-2100rpm on hwy. I have found that 1700 is where my truck gets best hwy mpg (18-20 on a calm day)
This was with the smaller 245/17's and 3:55 gears.
I have since switched up to 275/20's and have just gone through a winter and wasn't as bad as expected, but definitely under geared. Specially driving around town.
After everything I've read, I am 90% convinced I should go with 4:10's, however, so many swear by 4:56 that I'm torn.
Add to that the place I called to do the job said the exact same thing; "Go with the 4:56, you will get better mpg even on hwy."
Now, I live in the prairies, so not much for hills ect. I could see if I lived around hilly terrain that 4:56 would be the way to go.
If I lived in the city and did 70+% of my driving there I could see 4:56 would be the gear to get.
But I live outside of town and probably do 70% hwy driving, although never over 70mph. Usually 60-65.
I do plan on doing some engine mods and I could see where a set of headers could change your sweet spot depending on what set you went with. (raise it in rpm if pipes are too large to retain bottom end tq)
The 04 Ram has always gotten very good mpg compared to most Ram owners I talk to, and I now contribute that to driving habits as well as the fact I had the smaller 245 tires which made the 3:55 gears a little better.
Still, while I can get great mpg on a calm day, any cross or head wind and the truck loses more mpg than any other vehicle I have driven.
This makes me think that maybe I could have done better with the same 245 tires and 3:92? (not as effected by strong winds/ elevation changes?)
Anyone out there running that combo and getting great mpg?
So when I originally did the calculation last fall, 3:88 was the gear that would put me right back to where I was with the 245's and 3:55 gears. So that would be the 3:92's.
I am turning larger heavier meats though, so that says 4:10 to me.
But everyone swears by the 4:56's!
Help!