Dodge Cummins Diesel Forum - View Single Post - What gear for 37s
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post #12 of (permalink) Old 09-05-2019, 10:12 PM
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Also don’t go getting all caught up in the numbers race.

4.10 vs 4.30 vs 4.44 vs 4.56

I see guys on here all the time debating over which is best. Trust me when I say this. Your rear end (your butt) will not feel a difference between those 4. The only difference will be final RPM +/- 100-300 RPM.

I’ve had 4.56 in my last 2 trucks and I now have 4.10’s. Guess what, they feel the same. The only thing you gain by going marginally higher is a higher final RPM, which as mentioned earlier is only suggested if you want to “comfortably” tow heavy 24/7.

But even then in order to get your power band back all you need is 3.8 something. Since none such gear exists the next best step is up, not down, that being 4.10. So now since you have more gear than you need, 4.10 is plenty to tow max #’s these trucks are capable of towing. The only reason go higher gear is to tow more “comfortably” not more weight.

'14 6.7 S465
'17 6.7
'18 6.7 S467.7
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