285/75/17 inch tires with 2.7 engine- 4.46 or 4.7 gears?

[peterh]

Disclaimer - I promise I have tried to figure this out based on the various threads/posts from people who know 100% more than I do (I know nothing). I still don't know what the relative behavior of each gear option will be with 285/75/17 (33.8 inches) inch tires and the 2.7 engine. Someone made a very helpful calculator pinned to this board but it did not include 34 inch tires as an option (which I get because it's not an option from Ford) But I would be grateful for any informed opinions or even educated guesses on how each gear option will behave (off the line, top speed, how hard the engine will work, MPG hit) This is one of my few remaining questions before I finalize my build. I have no intention of going to 35s - I have 285/75/17 on my Wrangler now and to me it's the sweet spot, but if the intel suggests I should gear up, even if just for re-sale, then maybe I will select the 4.7 gear option.
Thanks in advance!

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[PWillette]

If you have the choice I'd go 4.70 with a 34"ish tire

 

[Rivers90]

I would go go 4.7
Top speed is electronically limited and will not be affected by gear ratio.
4.7 will be faster off the line and have better acceleration.

With the 10 speed you have 3 over drive gears so mpg should not be a problem.

Off road 4.7 would be better as it gives you a better crawl ratio.

 

[VelocityBrew]

I plan on going the same route with the Badlands we have on order. If I understand it correctly and if its as simple the math looks the increase in tire height over the 32.8's with the 33.8's is theoretically like going with a 4.30 (4.27 Optional rear gear on trims lower than Badlands).

 

[peterh]

I plan on going the same route with the Badlands we have on order. If I understand it correctly and if its as simple the math looks the increase in tire height over the 32.8's with the 33.8's is theoretically like going with a 4.30 (4.27 Optional rear gear on trims lower than Badlands).

Thanks but what gear option are you choosing - 4.46 or 4.7? seems those are the two choices on the BL

 

[Mattwings]

It is not optional. 33" comes with 4.46, 35" 4.70s. Build and Price makes it look possible, the Ford ordering system does not allow it.

 

[VelocityBrew]

Thanks but what gear option are you choosing - 4.46 or 4.7? seems those are the two choices on the BL

We're not getting a Sasquatch, so 4.46.

 

[peterh]

aha! the light goes off finally. I did not realize that. so the question becomes, squatch or not if you are going to run 285/75/17. I don't want to because I am not likely to wheel hard. light trails, beach - 98% on road.

 

[Jackattack]

I'm going 4.7 on my badlands. I really wanted the optional wheels at first bc im going carb gray in color. But I also might go with 37's so the 4.7 is best as 4x4 parts (I think) stated that their bronco build was a sasquatch and all they did to fit 37's was 3 inch extended coil overs and upper a arms. No re gearing. I know you said you won't go 35's but if you ever do decide to change or sell, better for resale as well. Im assuming your considering this for badlands?

 

[Sean492]

The 4:46's will be more than capable for the 34" and are adequate for 35". Anyone and most who are planning on going with 37's are and should be 'Squatching' to accommodate.

 

[jay-rod427]

4.46 non squatch and you'll be fine. the 2.7 and A10 could car less about that tiny change in tire size from stock.

 

[johndeerefarmer]

Those ratios are so close together it won't make a hill of beans which one you get..

 

[ZackDanger]

aha! the light goes off finally. I did not realize that. so the question becomes, squatch or not if you are going to run 285/75/17. I don't want to because I am not likely to wheel hard. light trails, beach - 98% on road.

If you’re going to stick with a 285 width tire don’t squatch.

Squatch will give you the wider offset wheels and fender flares assuming a 315 width...

The 4.46 will be just fine for the 285/75

 

[AcesandEights]

The Rubicon comes with 33" tires and 4.10 gearing, and 4.46 is approximately 8% greater. An 8% taller tire would be almost a 36" tire. So, if you go with a 34" tire, 4.46 would be more than enough, based on what Jeep has been putting out for years.

I'm going non-squatch BL and 4.7 gearing, but I would be fine with 4.46.

 

[scuba]

The Rubicon comes with 33" tires and 4.10 gearing, and 4.46 is approximately 8% greater. An 8% taller tire would be almost a 36" tire. So, if you go with a 34" tire, 4.46 would be more than enough, based on what Jeep has been putting out for years.

I'm going non-squatch BL and 4.7 gearing, but I would be fine with 4.46.

Were you able to order non-squatch Badlands with 4.7 gearing? Some posts say that's not possible.
If so, was their an upcharge? I have an early reservation, but hesitated on ordering, so trying to sneak an order in today.

I recently re-geared another vehicle (to be lower), and have been super happy (despite there being valid points on both sides).

Thanks in advance.
-Scuba

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