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Old 08-04-2014, 10:32 AM   #1
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Best for Towing

I have narrowed my search down to two Ram 2500's. One has the 5.7 hemi with the 4.10 rear end. The other is the 6.4 hemi with the 3.73 rear end. Any thoughts/comparisons between the two for general driving and towing a 7,000 pound travel trailer would be greatly appreciated.

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Old 08-04-2014, 10:39 AM   #2
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I would get a diesel for a 7K lb trailer. You'll thank us later.

I know, that's not what you asked, but that's going to be the answer you'll generally hear anyway.

If you insist on one of the others, get the 6.4 with 4:10's. 4x4 or a locker.

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Old 08-04-2014, 12:05 PM   #3
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While I prefer a diesel, either of those motors will work fine with a 7K trailer. Same with the rear gears. You may notice a slight improvement towing with the 4:10's but they will reduce your MPG's. The 3:73's will not show a significant reduction towing but you'll see better MPG. That said, the difference in MPG will not be significant. I would say pick the one you like better and go have fun.
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Old 08-04-2014, 02:06 PM   #4
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JMHO 6.4 with 4.10's.
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Old 08-04-2014, 04:32 PM   #5
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Originally Posted by sellis1053 View Post
Any thoughts/comparisons between the two for general driving and towing a 7,000 pound travel trailer would be greatly appreciated.
Old saying in the towing circle: "There is no substitute for cubic inches".

5.7L = 350 CID. 6.4 L = 390 CID. Go for the 390 CID.
Grumpy ole man with over 50 years towing experience. Now my heaviest trailer is a 7,000-pound enclosed cargo trailer, RV is a 5,600 pound Skyline Nomad Joey 196S, and my tow vehicle is a 2012 F-150 3.5L EcoBoost SuperCrew.
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Old 08-04-2014, 04:40 PM   #6
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Agree with the rest, if you are not going with a diesel, then go bigger size. You will be able to use less of the total power, but you will never be able to have more. So get the bigger engine and have more reserve. Make sure to get the factory towing package with extra radiator cooling capacity and bigger trans cooler, might even include an engine oil cooler as well. Towing package may also have 4.10 gears as part of the package. Recommend limited slip rear diff, good for lower traction situations when trying to get that trailer positioned just right.
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Old 08-04-2014, 09:19 PM   #7
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I drove both and the power on the 6.4 came on earlier and was a lot nicer to drive. I tow about 8500 lbs with the 6.4 w/ 3.73 and am quite happy with the power, which I don't think would have been the case with the 5.7. Also the newer 6.4 will get the same or better empty mpg as the 5.7. And where I live I can't go anywhere without some kind of a hill or pass to go over. Also, with the 5.7 the truck has 9000 lb gvwr, with the 6.4 it has 10000 lb gvwr.

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