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Is anyone running 3.31 Dana 80 axle ratio gears?


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02 3500 dually 6sp NV5600 Rear wheel drive 3.55 ratio dana 80

 

Are you or do you know of anyone running 3.31 ratio gears in a dana 80? 

 

I'm currently running 3.55's and would like to switch to 3.31's so I can run lower rpm's in 5th (1:1) gear while towing.

 

If you have done this I would like to hear about what you think & how your truck is performing while running 3.31's.

 

Thanks!

Edited by Ironforger
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32 minutes ago, Me78569 said:

what size tires?  

 

I plugged in stock tires to the gearing calc, and I can't see needing to get revs up in 5th if you have stock tires.  

 

 

I'm running stock tires 235/85 R16.

I'd like to lower my revs. Not looking to get rev's up.

 

Where can I find the gearing calculator?

 

Thanks!

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How low an RPM do you what to run?  Towing at to low an RPM will cause the engine to "lug" and that may cause rod bearing damage.  If you're towing a trailer with ST tires the max recommended towing speed is 65mph.  

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