Im new to the whole transmission thing and I am wanting to put bigger tires on my 05 Screw that 4x4. I have 3:73's now and Im wanting to put 33x12.50/18 toyo m/t's or 295/70/18. Im wanting to know if regearing is worth it and if so whats the right gears. I am also wonder how much power/ mpg I may get back from them?

 

unless you tow alot. it shouldn' be that much added stress on your trans with 3.73's. Just if you can stand your power loss. Who makes a 295/70/18?

 

Nitto. In the terra and trail grapplers. I want the trail grapplers. I dont really tow alot but when I do its pretty heavy.

 

Well that's like a 34" tire i believe. Your fine with 3.73's imo. You'll just have to decide if the power loss is too noticable for you. If you do decide to do gears, do 4.56's atleast. It's gonna run you around $1500.

 

would a tuner make up for any lost power and maybe a mpg or 2 back?

 

A lot of guys will say "go big or go home". But you have to consider what will work for you. Not all of us need 4.56 or lower. Lower gears will give you lots more torque, and get you moving. But what about mileage? Some guys build their trucks like they're off-road only rigs. How many rocks are you hopping? How much mud are your swimming through? Do you work on the beach? But if you've still got to drive this truck on the freeway, you don't want to "cruise" at 3500 RPM with 8 MPG. Get your lift if you want one. Then get the tire size you want. Drive it around. Then decide if you need new gears at all. Maybe if you get custom tuning, a little bit more power will help with those bigger tires.

 

Thats about my only option, Im stuck between a toyo 33x12.50 or 295/70/18. The 33's are an inch wider but the 295' are an inch taller. Im tryin to decide if it will equal out on power loss and mpg loss. any thoughts?

 

Just my opinion here but i think 33's are big tires on rangers, tacoma, s10 etc. I like the 34, 35's on full size trucks myself. More torque from gears will help your mileage compared to stock gears and big tires. I went with 4.88's bc i want to get my truck to where it is "quick" for what it is. A 97 4.6 with 35's. If you regear a 4.10 isn't quite going to get you back to your stock power, hence your gas mileage might be better than with stock gears with bigger tires but worse than it was stock with stock tire size. That's why most regear with a 4.56. Thats where your going to get the best mileage/all around performance. It's not going to be like a 4.56 with a 35 inch tire, its going to act more like stock tires with 3.73 gearing. Putting bigger diameter tires on your vehicle raises your ratio, numerically lowering it. Making your truck work harder to get up to speed. AND.. with 4.56's and 35's your not going to be anywhere near 3500 rpms. I mean i have 4.88's and im around 2600 rpms at 65 i believe, def not over 3000 tho. So anyway, if you decide you wanna regear. Go atleast 4.56. Any higher of a ratio like a 4.10 isn't going to justify the cost of gears imo. I would hate for you to spend all that money and not be satisfied.

 

I like the a 34 or 35 inch tire myself. Im just trying to make the most effective desicion. and I have never regeared a truck before. So if I go with 34's and 4.56 gears your saying my mpg would be better than stock gears and tires??

 

yes. your milage will be better with 4.56's compared to stock gears if you had big tires. But think about it, if your just concerned about gas mileage and not so much on the performance side. It might take you a while to make up the money for gears with your cash savings. But there is other factors. Its more stress on your transmission if you keep stock gears. I ran stock gears for a year with 35's and didn't have a problem. But i've heard of alot of people having to do a rebuild when they have big tires with the stock gearing. It just seems like i see it more on 2004+ f150's. Just think about it, do as much research as you can.

 

If you go with 33's, no need to regear unless you want more performance. If you had 3.55's i'd say regear for sure if you were goin 35's. But you can make it with 3.73's, like i said before just decide after you do it if you can live with the loss in power. Your power loss migth not be that bad with 5.4 and 3.73's. idk.

 

[QUOTE=offroadn'98;4345163]If you go with 33's, no need to regear unless you want more performance. If you had 3.55's i'd say regear for sure if you were goin 35's. But you can make it with 3.73's, like i said before just decide after you do it if you can live with the loss in power. Your power loss migth not be that bad with 5.4 and 3.73's. idk.[/QU

more than likely the power loss will tick me off. especially pulling stuff. about how much will it run to regear front and rear to a 4.56 and what gears, I have heard alot about whining and I dont want it to. And the mpg loss will tick me off too

 

I don't have any whinning with my motive gears but i've heard of people complaining about motive's. You need to go with yukon gears, it'll be around 1500 if you buy the gears and take it somewhere to for the install. Mine where $250 an axle. Shop around see what you can find. Remember you have to get a reverse cut for the front.

 

One more question about the mpg. If i get the 4.56 with 34's my mpg should be the same as stock around town and highway. I thought a lower gear would run a higher RPM and that equals bad mpg and more wear and tear. also I would need a tuner for the new gears?

 

You don't need a tuner for the gears. Yeah a higher gear does equal higher rpm's/worse mileage. BUT like i said above, bigger diameter tires effectively Raises your gear ratio, So its not going to a run a real high rpm unless your went and put some small tires on it. So with bigger tires, the lower gears is bringing you back closer to stock driveability/rpms. If you went with a 4.88, that would prolly be alittle too much gear unless you plan on 37's sometime.