Nobody ever said "I'm glad I got the 3.31's instead of the 3'73's".
When folks pay a couple grand to re gear they always go for more low end grunt.
When folks pay a couple grand to re gear they always go for more low end grunt.
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Big blocks are an entirely different animal. And the 460 didn't need gearing to help it.Which is about 3500-4000 rpm higher than where a 460 in a f150 on 35"s will comfortably cruise on the highway.
Which was my point.
The new engines require us to rethink rear end gearing towards deeper sets.
So, 4.27 is slower than 3.73?Always go low, unless you like to go slow.
So, 4.27 is slower than 3.73?
I'm new to all of this.
Thing people forget(or don’t know) is axles are a RATIO not just a number, so that’s what makes the bigger number a lower gear. There’s always a :1 that’s implied and typically left off for ease, that’s what makes the lower gears bigger numbers. It’s math.It’s really just inverted fractions, 1/3, 1/4, 1/5. So 3.73 gears is 1/3.73, 4.7 gears are 1/4.7.And just to help clear up any confusion that some may have.....
The Higher number (4.70 vs. 3.75) is the Lower Gear. (4.70 is a Lower Gear than 3.75)
Yes, it sesames backwards, but that's the way it is.
Then get the tallest gear possible from the factory. I’m assuming money isn’t a concern for the Bronco with the MPG comment so that’s why I’m saying just get the tallest possible.My primary goal is fun to drive, acceleration with comfort. MPG is not really a concern. I currently get 12 mpg
Thanks for the help!
First off to not confuse the class, when you guys say you lose top speed. Ok, so now the Bronco won't do 110, it will do 108? Something like that correct? Would hate to think that I'd be going from doing 80 @ say 2500 RPM, over to going 80 @ 4500 RPM with lower gears. I don't think that's the case, would assume it's more the can't do 110 anymore, now only 108 seems, logical with that statement.
A taller gear most definitely helps with towing. Going from 3.23’s to 4.46’s would be a massive increase and you should notice that your load gets moving faster and the vehicle doesn’t feel like it’s straining as much. This is also going to be helped by the fact you’ll have a 10 speed transmission and 2 extra gears over the Jeep (assuming you have the 8 speed).Secondly, my big thing was always towing. Wife's Jeep with the 3.23's (I believe) no good for towing. So for the hell of it, assume I upgrade the 3.73's to 4.46's (staying 33" or smaller tire), it helps greatly? I believe that is what @kodiakisland answered for me before. But a more involved explanation in this thread could certainly help the class even more when deciding.
It's a 2017 JKU. V6. From what I looked up, appears to be a 6 speed auto, 5 + Overdrive. And it struggles with a 12' trailer and some weight on it. Figure typical tow is around 1700 pounds (trailer) and about 1100 pounds (2 quads or quad + log splitter). So at or near 3000 pounds. I am looking for the Bronco to tow the 3500 (rated) pounds with ease, and definitely opting for the lower gears.You are correct in that it lowers the top speed AND will increase RPM’s for any given speed when you go to a taller gear. A jump from 2500rpm to 4500rpm will not be the case. I haven’t poured over the gear calculators, but you might see a jump from lets say 2500rpm to 2700rpm. It will be a minimal, although it will be noticeable if you’re looking, increase in RPM’s.
A taller gear most definitely helps with towing. Going from 3.23’s to 4.46’s would be a massive increase and you should notice that your load gets moving faster and the vehicle doesn’t feel like it’s straining as much. This is also going to be helped by the fact you’ll have a 10 speed transmission and 2 extra gears over the Jeep (assuming you have the 8 speed).