best gear ratio for 35" tires?

[sel]

i am building a 71 bronco from the ground up i have replaced every nut and bolt,powder coated the frame and axles,everything is pretty so far, so pretty that i dont think i will ever let it touch dirt. I plan on running 35" tires and am wondering what the best gear ratio would be? currently it has 4.11,,,is this okay?

 

[22213evl]

I have 4.11s in mine with 35" tires and it is like stock gearing ( 3.50 ) if you want a little more pep go with slightly lower gears if you want 80 mph 4.11s will work fine.

 

[00gyrhed]

past experience

I have 4.11s in mine with 35" tires and it is like stock gearing ( 3.50 ) if you want a little more pep go with slightly lower gears if you want 80 mph 4.11s will work fine.

Don't gear your vehicle for 80 MPH with 35s. A blow out of a 35 at that speed can be quite exiting to say the least. ;D

 

[bax]

Depends on the motor. A stock 302 would probably benefit from a higher gear say 4.56 But drop in a 351 and the added torque would make 4.11 a good gear. gear change vs motor swap

 

[Socal Tom]

i am building a 71 bronco from the ground up i have replaced every nut and bolt,powder coated the frame and axles,everything is pretty so far, so pretty that i dont think i will ever let it touch dirt. I plan on running 35" tires and am wondering what the best gear ratio would be? currently it has 4.11,,,is this okay?

Depends a little on the transmission. If you have a stock 3 speed, your going to eat clutches with a lot of city driving with 4.11s. With an auto you can run 4.11s, but I would double up on the tranny coolers.

4.56s or 4.30 gearing would be better IMO.
Tom

 

[cali_zuk]

I have a stock engine/c4 transmission, 35" toyo's on a 3.5" lift and 4.56s. At 65mph I'm turning ~3200rpms. Gas milage is about 10-12mpg. I have a built 331 w/4spd auto going in, otherwise I would have went with 4.10's.

 

[gravy]

I run an AOD with 35s and 4.88. It does 70 at 2200. I am going to 37s soon and swiching to 5.13.

 

[Z Bronco]

I have 35's, 351W, C4, and 4.11s. It has been a good combo for me.

 

[broncnaz]

I'd recommend about 4.30's or 4.56's. Any trans swaps or possibly bigger tires in your future? in that case maybe even 4.88's.
If your going to swap gears you might as well go lower as thats pretty much what your after anyways while hiway driving may be in the upper rpm's the 302 is happy there. The lower gears will make take offs much better and you'll pull hills easier. I'd also get a cam to match your driving needs.

 

[wildbill]

I would suggest 4:56's wont tax your motor that way good luck.%) %) %) Bill %) ;D

 

[av bronco]

If you dont have any long uphill pulls the 4.11s are fine.

 

[markperry]

My vote is 4.56

 

[RnrdTheFox]

I would go with 4.56's. Like you, I had 4.11's and 302. I also run a 4R70W tranny. It worked fine but I wanted a little more gearing especialy when curising the interstate with a head wind or when climbing some of the hilly roads out here in CO while using the OD. I spend most of my time on the roads driving around town and to and from work. I like the combo.

 

[351EFIZF]

I run 35s with 4.11s. With my setup my Bronco gets 15mpg highway. If I had to do it over I would get 4.56 gears. Its only 10% lower gearing.

 

[broncotime]

I have 35 inch tires w/4.56 gears and while it's great combo on the trail, I don't like it on the freeway. You mention that your truck will probably never see dirt, so I would go with the 4.11 gears unless you are putting in a tranny with an overdrive.

 

[sprdv1]

4.11 or 4.56 depending on the majority of your on or off road use

 

[jaysend5.0]

You have 4.11 now. stick with it. I think for a street only bronco it will be just fine. If not regear down the road. Plus that buys you time in case anything changes. Like you decide to wheel it or you want bigger tires ect...

 

[needabronco]

I've got 31"s and 4.88's now(no I haven't driven it like this but I want to;D ), but as soon as this build is over it'll have 35"s. I also have an AOD with the .67 overdrive which should help.

 

[Devin]

4.56ers.