So my truck is a 2004 ram 1500 currently my mileage is only like 9 mpg anyways as I drive only city most the time and I think my mods have me running rich and I need a professional tune. People tell me that going from 3.56 to 4.10 is going to make my mileage quite a bit lower, my question is will it and if so would it be a dramatic drop? I am running 35/13.5/20's on my truck for tires.

I had also considered 4.56 but I live in Manitoba Canada when its winters its fairly icy and snowy, so i'd probably spin out a lot more, and would like to continue to drive it year round.

 

Welcome back to DF. I will move your post to the correct section.

For future reference:
https://dodgeforum.com/forum/dodge-r...ead-first.html

 

4.56 gears will return the RPM's back to where it would be if your truck were totally stock.

4.10's would put the RPM's slightly lower than 4.56's and 3.55's are killing your transmission.

 

"People" don't know their collective asses from a hole in the ground. Going to numerically higher gearing will INCREASE city driving although it will slightly decrease highway fuel economy.
Using less gas peddle to achieve the same rpms means less fuel used during stop/go driving.

 

I kinda have to disagree with you a bit on this point.

It would actually INCREASE his hwy number a tad depending on where he lives. When you take into consideration how much the transmission has to hunt for a gear at hwy speeds and how much the engine is revving in the passing gear, I think the lower gears would be beneficial even on the hwy.

 

My truck is my winter ride. I like my 4.56 a lot more than the 3.55 in the winter. Highway is nicer since you're purring along in OD without having to worry about a bunch of downshifting that might swing you around.

 

Funny how folks say shorter gears will improve mileage across the board. In town - MAYBE. On the highway, definitely not. If 4.56s were the end-all, cure-all, that's all the manufacturers would use. Would certainly reduce their costs.

 

You gas mileage will stay the same on the Highway if you drive slower than before and keep the same RPM

 

"... drive slower ..."?! Sacrilege!

 

Thanks I think I'm going to go for 4.10's, everyone does say 4.56. I'm not so much worried about lost mileage, like .5 or so wouldn't matter to me as long as I gained enough power to justify it. But with my wide hard tires I'd just burn though tires and lose power from spinning out so much. I've only driven highway maybe 2 times in last year so the highway mileage isn't a big concern.

I don't know how you drive 2wd with 4.56 in winter you do have a lot more narrow tires then mine though must be winter or studded or do you use weights? Most winter days unless we've been like week without snow I need 4x4 to go anywhere when I had 3.56.

My only options in terms of tire would be go smaller and get winter/studded which would look horrible. I can get a General grabber 35/12.5/20 not winter tires but can get with studs but most studs are gone first year and can't restud again. Might just get some old springs from work to weigh down my back end if the 4.10s make me spin.