4.10 gears and 33's

Chris knows all...

 

You drive around chino right?? I've seen you're truck alot lately...I'm regeared if you wanna see how 4:56s run...I regeared about a year ago. let me know...

 

I agree

 

so 4.10s from a 4cyl WILL fit my truck no issue? Should I even bother regearing when I get 285s?

 

do you think that it will be worse than stock though?

 

I see the argument but that goes against what I've seen.

I've tried many times with a scangauge to compare mpg using 4th and 5th gear, and in every situation 5th gear shows better mpg even if at lugging speed. On flat ground or climbing a hill I never see an increase in mpg with higher rpm and more leverage as you describe. Driving at near lugging speed is essentially the same as bigger tires and no regear.

All us hypermilers keep it low rpm short shifting below 2000 rpm with no leverage, but better results.

This is a topic that I haven't found any solid testing done after much research.

 

Yeah i think i have seen your truck a lot this week. That would be cool if i could see how it runs. What would you say you top out at? And if your still doing the led speedometers, id be interested in that too. Thanks

 

Yup, you have your custom CA plates "VOLCOMA" right??
Let me know, and yes I still do the swaps...send me a pm n we can meet up.
I saw you yesterday at Chino high when I went to pick up my bro

 

If i went back to even getting to close to the mpg's i did when i was stock that would be fine. Anything better than what i get now would be good. I just wanted to make sure i could at least get to 90-100 mph top speed

 

I haven't even burned up 1 whole tank of gas yet! I just got them last week. I can tell you that I drove around in the woods all day and only burned 1/2 tank. It seems to be better.... (I know it is.) I will PM you once I do a mileage check OK?

That's what I did! Did you check out my thread I linked in post 7?

My truck could do 100mph easily. I have to double check, but at 60MPH I am only at 2000rpm or so. It dosen't seem to me like it is winding up bad on the highway at all. It's perfect, and the power aint bad either!

It's pretty nice not having to mash down on the gas, and force it to drop down a gear, to make it go anymore!

Again, I am running 4:10's and 255/85/16's in my 2006 4.0L 4X4.

 

Thats basically what i was looking for some extra acceleration power and not getting horrible gas milage on the freeway, thanks

 

Is this what you are directing me too?

"Your truck comes from the factory with the optimum axle gear ratio to work with the truck's engine, transmission, and stock tire combination as well as provide a good balance between acceleration and fuel economy. When taller tires are installed on a truck but the axle ratios stay the same; the effective gear ratio is reduced. This means the engine is forced to operate below its power band, and performance and fuel economy suffer as a result. In order to restore the effective gear ratio (and the truck's performance), you'll need to have the axle gears swapped to lower (numerically higher) ratios."

I'm intentionally staying below the powerband of my engine with excellent mpg, but this says I'm wrong. It doesn't say my test method is flawed. It does speculate that every car manufacturer is optimized every engine/tire/gear combination which we know isn't true. My wife's Element spins 4000 rpm at 80, that is retarded Honda optimizing.

This also from your link would seem to agree with my take.

"If you're looking for a ratio that will give better fuel economy for highway driving at the expense of some acceleration and overall performance, choose a ratio in the yellow shaded area. If you're looking for a ratio that will improve acceleration and towing power at the expense of some fuel economy, choose a ratio in the blue shaded area."

 

Dude it does not work the same using a fixed tire size and shifting gears. Bigger tires require harder accelerator pressing to get moving at the same rate. You regear you gain city stop and go milage... but have higher rpm on freeway at fixed speed. Changing your gear from 4th to 5th in no way simulates this. My buddy has done dozens of gear swaps on Tacomas and Jeeps and always gets better mileage. Am I supposed to believe his and everyone else's real world experience or your imagination based off a flawed experiment?

Reagearing will boost your milage in the city. He also told me I would get a similar gain in city milage with 4.56 in the city but hurt highway milage substantially. The negative is the requirement for a new carrier if you go 4.11 in the front diff. Ther is no carrier break for rear gears. If you get a ARB up front it IS a new csrriet so not a problem... then there is the shortage of 4.11 gear availability.

 

Thanks for joining the conversation.

What you say may well be true for many applications, maybe with automatics it is different than manuals where I can pick the gearing and not be forced into some downshifting that big tires might cause.

With the V6 and poorly chosen OD 6th gear I would guess that with bigger tires you will gain back the mpg that you would have gotten if Toyota decided on a better OD like on the auto.

Anyone out there with V6 Stick find their mpg increased with bigger tires after factoring for tire size change? The extra weight and rolling resistance may simply offset the lower rpm, but I don't see how regearing to get back to a poor OD ratio for highway speeds will ever help mpg in that example.

If toyota optimized like we are supposed to believe the 6-speed would have the same OD gearing as the auto and there wouldn't be a 2mpg EPA hit with the stick.

 

Anyone running 33's with 4.10's and V6 - Automatic?

 

Me. See link in post #7.

 

How is that workin out for you? Happy with it?
MPG?

 

Very, very happy. I am still on my first tank of gas, just got them last week!

I will try and get some MPG#'s up soon.

The power you get back is noticeable, and much mo' better.