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Old 01-21-2015, 03:40 PM   #1
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Any Ram 2500 5.7 hemi owners?

I am thinking of upgrading my truck to the 2015 Ram 2500 SLT crew cab with 5.7L Hemi, 6 speed tranny, and 3.73 gears. How do you like this truck/engine combo? What are you pulling with it? My current truck pulls my TT just fine right now but I am maxed out if I want to upgrade. So, taking the advice of the forum I am thinking of upgrading the truck now so that I can upgrade to maybe a 5er in a couple of years. The 2015 Ram 2500 has 2,581 payload, 9,000 lb GVWR, and 18,300 lb GCWR. Would I have any problems pulling a 5er that is, say, up to 10,000 lbs? Of course if I decide to keep my present TT it looks like the 2500 truck will be at barely 50% capacity pulling my current TT so I should have no problems there. Just fishing for a little advice here.......
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Old 01-21-2015, 03:42 PM   #2
fx2
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I have a 2014 Ram 2500 with the 5.7 and love it. My 36 ft TT is about 8,300-8,500 loaded and I wouldn't hesitate to go to a 10k 5er with it.

Towing mileage is right about 10


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Old 01-21-2015, 03:54 PM   #3
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How much more is it, and would you consider going with the same 2500 but with the 6.4 Hemi? I would think it will give you a more leeway and that it won't be much worse for fuel economy.
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Old 01-21-2015, 04:02 PM   #4
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I didn't inquire about the 6.4 Hemi, but I may just to see what the other options are. I am not a diesel guy so I want to keep it gas and I think the 5.7 and 6.4 are the only options in gas on this truck
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Old 01-21-2015, 04:15 PM   #5
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I would definitely be looking at the 6.4 Hemi rather than the 5.7 if considering going to a 5W. The 5.7 is a good engine, but it is going to work hard with that load- expect high RPM's on all inclines unless you don't mind losing considerable speed. Also, note that if you load the truck to GVWR(9000), you will only be able to tow 9300 without exceeding GVWR. I don't think you'll notice any real difference in mileage, either. JMHO.
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Old 01-21-2015, 04:29 PM   #6
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I had the 5.7 hemi in my 1500. Very strong and realiable engine, will make you smile when you step on the gas.

There are some great feedback and reviews though on the 6.4. One of the bonus I would see with a 6.4, and even though I loved the 5.7, it runs on 87 octane instead of 89 octane that the 5.7 takes.
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Old 01-21-2015, 05:12 PM   #7
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I have an '11 2500 w/5.7 Hemi which pulls my GCVW of 15,000 just fine. It develops torque at higher rpms than diesels, so just keep it in Tow/Haul mode on hills & let it work... I average 10 mpg towing but it drops to 9 mpg in the hills.

I am the 2nd owner & there were no maintenance records online, etc. from the previous owner - so no data on how well it was cared for before... A few months ago it dropped a valve and blew to pieces inside... However, at 96,000 miles, Ram replaced it under their 100K Powertrain warranty. The newly rebuilt engine comes with a new 3 year warranty.

Based on this positive warranty experience I will likely buy another Ram 2500 when I am ready to upgrade. However, I will likely choose the 6.4 since it gives extra Tow Capacity & Payload for very little extra cost. With gas prices being 2/3 the price of diesel, it is hard to justify the added costs of a diesel unless you really need it...
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Old 01-21-2015, 06:11 PM   #8
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Looks like it is another $1400 to upgrade to the 6.4L Hemi with 3.73 gears and yes, the 6.4 uses 87 octane while the 5.7 is rated for 89 octane. However, the 6.4L only increases the GVWR by 1,000 pounds and does not increase the payload so I am not sure the trade off is worth it.
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Old 01-21-2015, 07:03 PM   #9
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Just some info. the 5.7 is recommended to run 89 but can run 87 octane no problem and my 2 5.7's are proof. I have never run 89 in either .

are you sure about the payload?

http://www.rambodybuilder.com/2015/d...ammlup2500.pdf

looks like quite a big gain in payload to me.



Quote:
Originally Posted by Skippy38 View Post
Looks like it is another $1400 to upgrade to the 6.4L Hemi with 3.73 gears and yes, the 6.4 uses 87 octane while the 5.7 is rated for 89 octane. However, the 6.4L only increases the GVWR by 1,000 pounds and does not increase the payload so I am not sure the trade off is worth it.
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Old 01-21-2015, 07:16 PM   #10
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Quote:
Originally Posted by jgroff View Post
Just some info. the 5.7 is recommended to run 89 but can run 87 octane no problem and my 2 5.7's are proof. I have never run 89 in either .

are you sure about the payload?

http://www.rambodybuilder.com/2015/d...ammlup2500.pdf

looks like quite a big gain in payload to me.
WOW, you are correct. I REALLY misread the stats. Payload goes from 2,680 to 3,610 quite a bit of an increase. Not sure I would NEED that much payload but it would be nice to have. I will have to run the numbers to see how long it would take to recapture the $1400 increase to go to the 6.4L just from the difference in gas costs. I read on a few forums where guys run 87 octane then run a tank of 89 octane every 4th tank full to clean it up.....
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