what gear ratio do you have

[AUTOTECH SON :)]

what kind of prices should i be looking at per axle? for labor

Around $500 - 600. If I recall thats what my dad charged but id have to ask to be shurr.

 

[AUTOTECH SON :)]

i dunno, im runing 32"s on 4.56 and im getting gas mileage thats unheard of. but i also dont use the highway and dont normally go above 60-65 mph

Im gaging for 75 - 80 hwy. Not 55 - 65 free way. But an rpm range below 3000.

Also im shooting to have the ratio stay at factory 3.27 not above or below by much. Since a ratio of 3.27 is more balenced in my op for gas and torq.

It placed the rpm low but not to low. You have power to move the tiers tow and go offroad.

 

[93FoRdExPlOrEr]

i dont know what i have....its stock, what gears should i get? im gonna most likely run 33's

 

[AUTOTECH SON :)]

i dont know what i have....its stock, what gears should i get? im gonna most likely run 33's

I would get 3.73's that will place your rpm at around 2500 at 75mph that would give you a ratio of 3.27.

for 31's 3.55 would place the rpm around 2660 at 75 mph and a ratio of 3.27.

 

[AUTOTECH SON :)]

i dunno, im runing 32"s on 4.56 and im getting gas mileage thats unheard of. but i also dont use the highway and dont normally go above 60-65 mph

that gives you a ratio of around 4.13. Like I said b 4 4.10 is a good general ratio for tow and offroad not the best on gas but ok. My dad sess having a 4.10 ratio is a general perpouse ratio but im lening to better gas and a bit more balence. So I like to have a total ratio of 3.27 on the explorer. It mostly depends on perpouse I use mine as a dayly. So I like to have better gas.
4.10 is better torq. When I do my gear choices I pick between having a total ratio of 3.07 for hwy, 3.27 for balence, 3.55 for towing, 4.10 for off roading.

I tend to leen on having an end ratio of 3.27.

 

[Creager]

Im gaging for 75 - 80 hwy. Not 55 - 65 free way. But an rpm range below 3000.

Also im shooting to have the ratio stay at factory 3.27 not above or below by much. Since a ratio of 3.27 is more balenced in my op for gas and torq.

It placed the rpm low but not to low. You have power to move the tiers tow and go offroad.

yeah for me 55 mph in OD is ~2300 rpms. which makes 65 mph ~ 2800rpm

with 33"s that would make things a lil bit better. i plan on running 33"s, and maybe 35"s so 4.56 is great for me in the long haul. 4.10 would be much better on gas, but if your like me, and going over 70 isnt that big of a deal then 4.56 is probably your passion. You would love it, getting that kind of take off and torque from the 4.0 is spine tingling.

that gives you a ratio of around 4.13. Like I said b 4 4.10 is a good general ratio for tow and offroad not the best on gas but ok. My dad sess having a 4.10 ratio is a general perpouse ratio but im lening to better gas and a bit more balence.

4.10s and 31"s would be very nice. i dont think gas milage is going to suffer unless you run ++80 in an explorer a lot. Esspecially if you are use to 3.73 on the stock 29 in tire.

4.10's on 33"s would be like having 3.27 stock. 4.56 on 33's would be like having 3.73 stock. it depends on what you like

 

[slravene]

with my mix of driving should i wait on the 410s or just go with the 373s, what kind of mpg should i expect with both city/highway? and i started off with 355s

 

[AUTOTECH SON :)]

4.10s and 31"s would be very nice. i dont think gas milage is going to suffer unless you run ++80 in an explorer a lot. Esspecially if you are use to 3.73 on the stock 29 in tire.

4.10's on 33"s would be like having 3.27 stock. 4.56 on 33's would be like having 3.73 stock. it depends on what you like

3.73's and 33's is like having a ratio of 3.27
4.10's and 33's is like having a ratio of 4.10
4.56's and 33's is like having a ratio of 5.19

 

[Creager]

3.73's and 33's is like having a ratio of 3.27
4.10's and 33's is like having a ratio of 4.10

realistically its not (what you would want). Mathmatically yep, works in theory.

3.73 and 33"s is like having 3.08. maybe less... serious 4.10 is the highest you are going to want to go with 33"s, 4.33 would be IDEAL gas milage/power.

i ran 32"s on 3.27... even the gas mileage was horrible. I get better milage with 4.56

what you guys need to think about...

when you put bigger tires on your stock ratio your engine is going to strain a lot more; strain = excessive gas consumption. Putting a lower ratio in works exponentially, you put bigger tires and you're not only getting a higher output ratio you are also putting more weight on the drivetrain.

The gears only make up for the ratio adjustment. the engine has to make up for the rest. going a step up in ratio helps offsets the added weight of the tires, to where it seems like the engine is working 'stock again.'

but only running 31x10.5"s street tire you wont really notice. 32x11.50"s MT's you will begin to notice big time.

 

[slravene]

The fastest i run it is about 70-75 would 410s on 31s hurt me then or would it still be ok

 

[Creager]

The fastest i run it is about 70-75 would 410s on 31s hurt me then or would it still be ok

you would be perfect. you would love it, you would wish you went with 4.33 or even 4.56

are you putting those gears in yourself?

the 4.0 is a dog. its not going to get great gas milage, nor is is going to ever have a lot of power. do what you can to please yourself.

 

[slravene]

I dont know how, im trying to find somewhere cheaper in charlotte to do it....everywhere wants like 350-400 per axle...

 

[slravene]

I wish i knew how to do it, or knew someone that did, that would make it easier

 

[Creager]

I dont know how, im trying to find somewhere cheaper in charlotte to do it....everywhere wants like 350-400 per axle...

yeah 4wheelparts on south bullie told me they wanted $1400 bucks to do both front and year

that afternoon i spend 6 hours reading up on installing my own gears. haha

 

[slravene]

wait did you do yours? wanna do mine too? lol

 

[AUTOTECH SON :)]

realistically its not (what you would want). Mathmatically yep, works in theory.

3.73 and 33"s is like having 3.08. maybe less... serious 4.10 is the highest you are going to want to go with 33"s, 4.33 would be IDEAL gas milage/power.

i ran 32"s on 3.27... even the gas mileage was horrible. I get better milage with 4.56

what you guys need to think about...

when you put bigger tires on your stock ratio your engine is going to strain a lot more; strain = excessive gas consumption. Putting a lower ratio in works exponentially, you put bigger tires and you're not only getting a higher output ratio you are also putting more weight on the drivetrain.

The gears only make up for the ratio adjustment. the engine has to make up for the rest. going a step up in ratio helps offsets the added weight of the tires, to where it seems like the engine is working 'stock again.'

but only running 31x10.5"s street tire you wont really notice. 32x11.50"s MT's you will begin to notice big time.

Hmm I am calculating this but what type of trany do you have and whats your milage?

 

[slravene]

I have the stock 4R55e or whatever, (i think) and i get about 210 miles per tank or something like that came out to be like 12mpg or something

 

[AUTOTECH SON :)]

Hmm right now I get about 22 mpg. I have a ratio of about 3.06 till I regear my self.

O and I have a A4LD.

Im runing 31's my stock ratio. I plan on going 33's no higher.

 

[Creager]

wait did you do yours? wanna do mine too? lol

haha to be honest i wont touch your front end. im no professional, i work on my own truck but i cant be liable for someone elses.

yr rear 8.8 shoot man you get the tools, case of bud heavy, man i ill be up there help ya out. We'll need a press, i took my pinion somewhere to get the pinion bearing pressed on, costed $35 for half hour labor.

main things about doing your own gears, i ended up paying more (for tools and all the other jazz) then if i would have gotten it done somewhere.

whats your stock ratio? it could be realitivly easy.

 

[slravene]

what the crap...how do you guys do this, i only got 225 miles per tank when i was bone stock......this poor mpg issue is killing me