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An Engineer's Ultimate Guide To 3.21 VS 3.92 Axle Ratio

ferraiolo1

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Food for the thought.

If you have 3.92s and install 35in or larger tires, didn’t you just essentially turn your superior truck into a truck with 3.21s and stock tires when it comes to rpm to speed ratio and off the line feeling?


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AngelPhoenix

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Food for the thought.

If you have 3.92s and install 35in or larger tires, didn’t you just essentially turn your superior truck into a truck with 3.21s and stock tires when it comes to rpm to speed ratio and off the line feeling?


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#NoLiftLife
 

BowDown

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Wonder how many posts we could get out of an Android vs. Apple thread. :unsure:
Which gear in the Android and Apple?
Android with 3.21 is far superior to the Apple with the 3.92.
Apple with 3.21 almost as good as Android with 3.21. Android with 3.92 worse than Apple with 3.92, now if the Android has etorque, all bets are off but if the Apple has the eco with 3.55, it's superior to all
 

AngelPhoenix

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Which gear in the Android and Apple?
Android with 3.21 is far superior to the Apple with the 3.92.
Apple with 3.21 almost as good as Android with 3.21. Android with 3.92 worse than Apple with 3.92, now if the Android has etorque, all bets are off but if the Apple has the eco with 3.55, it's superior to all
giphy-downsized-large.gif
 

Selcher

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Food for the thought.

If you have 3.92s and install 35in or larger tires, didn’t you just essentially turn your superior truck into a truck with 3.21s and stock tires when it comes to rpm to speed ratio and off the line feeling?


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When I put 325/60/20's on my last Ram it effectively made the gear ratio 3.73's so still a lot better than the 3.21's... 😉
 

ferraiolo1

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Not only factoring the overall diameter. But the increased weight and rolling resistance.


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Idahoktm

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When I put 325/60/20's on my last Ram it effectively made the gear ratio 3.73's so still a lot better than the 3.21's... 😉
Going from 32" tires to 35's should have netted you a 3.56 ratio. My 33's turned my 3.92's into a 3.79.
 

nc_beagle

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Which gear in the Android and Apple?
Android with 3.21 is far superior to the Apple with the 3.92.
Apple with 3.21 almost as good as Android with 3.21. Android with 3.92 worse than Apple with 3.92, now if the Android has etorque, all bets are off but if the Apple has the eco with 3.55, it's superior to all
My Note 9 with a 3.92 gets 36-48 hours on a charge with moderate use and can pull a 4GB app without breaking a sweat.
 

Selcher

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Going from 32" tires to 35's should have netted you a 3.56 ratio. My 33's turned my 3.92's into a 3.79.
That would be true if 35 inch tires were 35 inches and not 34 or 34.2 inches...
 

BowDown

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My Note 9 with a 3.92 gets 36-48 hours on a charge with moderate use and can pull a 4GB app without breaking a sweat.

Not surprised, the note is more like a 2500 with the CTD so that's expected out of it. It could stack two 3.92 geared iphones on it's back and not know they were there.

I don't have Note CTD money so I'm saddled with the S21 Ultra and as you can plainly see by the 21 designation, it's got the 3.21 gear. It also pulls a 4GB app without breaking a sweat (also has etorque).
It's a little thirsty with WQHD turned on (got to have that blinging 12" display) but it can make 36-48 hours with normal use thanks to etorque and 2 extra battery octane points
 

BowDown

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There was plenty of weight added... Plenty! Lol

That's no lie, you can feel and see tire weight.
I went from street tires to drag radials on my car and lost 10 rwhp on the dyno. Couldn't feel it because of how much power the car makes but you could see it on the dyno and at the track
 

Selcher

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That's no lie, you can feel and see tire weight.
I went from street tires to drag radials on my car and lost 10 rwhp on the dyno. Couldn't feel it because of how much power the car makes but you could see it on the dyno and at the track

Yeah, going from my lifted '15 to this new Limited is a completely different driving experience. These 5th gens are so damn smooth.
 

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