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Old 06-24-2014, 05:33 PM   #1
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RAM diesel trucks with little rear ends

I was thinking about buying a 2014 2500 Ram today, but noticed they only offer a 3:42 rear axle ratio rear end for their 2500 diesel trucks. They still claim a towing capacity of 17,800 or so, which is what used to require a 3:73 rear axle ratio. They still offer their heavier rear ends for their eight-cylinder gas Hemi trucks, and 3500 models, but no longer available on 2500 diesels. How can this be? I thought you had to have a 4:10 (also not available) or at least a 3:73. Does the engine make up the difference somehow? Does anybody out there have any experience with these trucks? Any problems towing heavy loads? Any tips would be appreciated.
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Old 06-24-2014, 05:53 PM   #2
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I'm Dodge 2500 shopping, too. I noticed that. Perhaps they have decided to try to get their non-towing mileage up a bit. I'll probably buy one in the next month or so, when the rebates jump up a bit. The rear-end ratios are not that far apart, but I know it will make some difference. Maybe they changed their towing shift points to make up for the difference. Who knows?

Good luck with your new truck...
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Old 06-24-2014, 06:38 PM   #3
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I have a 2013 3500 with the Aisin transmission, 3.42 diff. and 20500# tow rating and I wouldn't want it any other way. With the Aisin you get 850 lb ft torque.
I'm not sure whether it's available in the 2500 Ram. You want the torque to overcome the low diff. ratio, it sure gives you decent fuel mileage when not towing.
To my knowledge the Cummins still puts out 800 lb ft when hooked up to the standard automatic transmission and that is still pretty good but I'm not sure if 17800 # in tow would be pushing it for 3/4 ton.
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Old 06-25-2014, 09:11 AM   #4
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Thanks for the info, guys. I'm thinking maybe a 3500 is the way to go.
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Old 06-25-2014, 09:24 AM   #5
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It's all about torque. The diesel engine has almost twice the torque of the 5.7L gas engine so the rear end ratio can be lower with the same/better towing results!
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Old 06-25-2014, 04:06 PM   #6
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Hello, my previous 2012 ram 2500 came with 373 rear end and my 2015 ram 3500 has the 373 in it to.


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Old 06-25-2014, 04:23 PM   #7
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I have a 2012 3500 DRW/4x4/with 4.10s and my mileage sucks. But, I can pull the face off of a mountain.
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Old 06-25-2014, 04:23 PM   #8
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The rear end isn't the only factor when it comes to gearing. How the transmission is gear plays a roll to.


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Old 06-25-2014, 09:34 PM   #9
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Quote:
Originally Posted by bignugget View Post
The rear end isn't the only factor when it comes to gearing. How the transmission is gear plays a roll to.


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And engine torque
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Old 06-26-2014, 08:02 AM   #10
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Yep


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