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Old 08-09-2013, 03:07 PM   #1
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Need help looking at a new truck

Need help. I have a fifth wheel DRV 38 ft mobile suites. Dry weight of 14,400. Looking at a 2014 3500 4 x2 dually 6.7 turbo Diesel engine crew cab long bed Dealer says I problem. Can toll this easy. True? Or not true. What I read to me is yes. But I am not truly understanding it all All advise will help. See dealer tomorrow
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Old 08-09-2013, 03:15 PM   #2
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Ram or GM? Since the equivalent Ford model nomenclature is F-350, I'm assuming that the "3500" indicates that your question pertains to either the Ram or Chevy/GMC. I'll address my response on the basis that you're looking at the Ram - if it's the Chevy/GMC, not all of the following will apply.

First of all, forget the dry weight. The 5th wheel will weigh more than that when you tow it off the lot. Use the 5th wheel's GVWR for sizing purposes. If you're looking at the Ram 3500, then (assuming you're going to get either the 68RFE or Aisin 6 speed automatic), be sure it has the 4.10 (preferred) or 3.73 (acceptable) axle ratio - NOT the 3.42. This will be listed on the window sticker. The lower (higher numerically) the axle ratio, the greater GCWR capabilities the truck will have.

Most likely, the 2014 Ram 3500 can handle it without exceeding any of the manufacturer's ratings, but to give you a more accurate answer, we need to know the 5th wheel's GVWR and more details on the truck you're looking at.

Rusty
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Old 08-09-2013, 03:55 PM   #3
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Ram is correct. Sorry. Will look at others. Do not know but will look for other info
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Old 08-09-2013, 03:58 PM   #4
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Why not the 3.42 ? Has that and 6 speed asein transmission. Says it can tow 20,000 lbs.
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Old 08-09-2013, 04:18 PM   #5
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Cool

Quote:
Originally Posted by RustyJC View Post
Ram or GM? Since the equivalent Ford model nomenclature is F-350, I'm assuming that the "3500" indicates that your question pertains to either the Ram or Chevy/GMC. I'll address my response on the basis that you're looking at the Ram - if it's the Chevy/GMC, not all of the following will apply.

First of all, forget the dry weight. The 5th wheel will weigh more than that when you tow it off the lot. Use the 5th wheel's GVWR for sizing purposes. If you're looking at the Ram 3500, then (assuming you're going to get either the 68RFE or Aisin 6 speed automatic), be sure it has the 4.10 (preferred) or 3.73 (acceptable) axle ratio - NOT the 3.42. This will be listed on the window sticker. The lower (higher numerically) the axle ratio, the greater GCWR capabilities the truck will have.

Most likely, the 2014 Ram 3500 can handle it without exceeding any of the manufacturer's ratings, but to give you a more accurate answer, we need to know the 5th wheel's GVWR and more details on the truck you're looking at.

Rusty
Must be Ram since the OP said 6.7 as the GM twins are 6.6.
But there were a lot of typo's in his post.
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Old 08-09-2013, 04:45 PM   #6
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Because you'll be towing in 4th and 5th gears. If the "manufacturer's trailer tow rating" is 20,000 lbs, you can knock 1500 to 2000 lbs off of that in the real world once you get your truck equipped and loaded. The 20,000 lb rating is based on a base truck (no additional options or accessories) with only a 150 lb driver. It doesn't even include the weight of the 5th wheel hitch. By the time you get your truck equipped and loaded, every additional pound has to come off that 20,000 lb rating.

This isn't a single rear wheel (SRW) truck, is it?

Rusty
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Old 08-09-2013, 05:23 PM   #7
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Quote:
Originally Posted by Sightseer33 View Post
Need help. I have a fifth wheel DRV 38 ft mobile suites. Dry weight of 14,400. Looking at a 2014 3500 4 x2 dually 6.7 turbo Diesel engine crew cab long bed Dealer says I problem. Can toll this easy. True? Or not true. What I read to me is yes. But I am not truly understanding it all All advise will help. See dealer tomorrow

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Old 08-09-2013, 05:25 PM   #8
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Just double checking - SRW Rams are only available with the 3.42 gears because of Federal CAFE (corporate average fuel economy) regulations. Duallies can get 3.42, 3.73 or 4.10.

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Old 08-09-2013, 05:27 PM   #9
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Our gvwr is 19,900 per the hitch. The pin weight dry is 3395 but again was not the 3.42. The truck we are looking at is that
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Old 08-09-2013, 05:30 PM   #10
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You do not want to spend all of your time towing in 4 or 5th gear. You want the engine peak torque RPM to be near your normal road speed...65 mph when in top gear. When you get a 3.42 axle, you will be running well below the torque peak at road speeds and dropping to 4th or 5th on every hill to maintain power.

A 4.10 or 3.73 will make a much better towing machine with such a heavy trailer, especially in the hills.

You do want to let the torque amplification in the rear axle, not the transmission.

With that GVWR, your loaded pin weight will be closer to 4000#, not the brochure 3400#.

Truth is you may need to be looking at an F450, or a 4500 series truck and not a 1 ton. A lot of folks with these larger 5ers will got to a MDT (medium duty truck) like a Freightliner FL60 or FL70 or even a converted Class 7 or 8 HDT (tractor).

Ken
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Old 08-09-2013, 05:31 PM   #11
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A 20,000 lb "trailer tow rating" is insufficient for a 19,900 GVWR 5th wheel for the reasons I cited. You need to look for a Ram with a lower axle ratio (as I said, 4.10 preferred but 3.73 probably acceptable) and check the "trailer tow ratings" on those.

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Old 08-09-2013, 06:14 PM   #12
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The new Ram 3500 Dually if equipped correctly can tow your 5er. Check with the dealer to see what other new dually trucks he has.

20,000 lbs.will not be enough.
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Old 08-09-2013, 06:25 PM   #13
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A buddy had the same mobil suites, same weight. Towed with an F550. I asked why not an F450? He said, because it drives so much better.

Just sayin....
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Old 08-09-2013, 07:45 PM   #14
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Sightseer 33: Don't trust all us "experts" on the internet and definitely do not trust the salesman that wants to close this deal. Look up the towing specs on the 2013 Ram web site for yourself. There is a spec sheet 20 pages long that details exactly how much pin weight (cargo capacity) and how much towed weight for every model, axle ratio, box length and configuration of Ram truck. One example: the max trailer weight was 5,000 pounds lower for 3:42 axle vs same truck with 4:10. It's you money and your safety - you need to do your own homework. BTW the 19,900 GVWR rating on the hitch does not mean the truck is capable of pulling that much.
PS: I have a 2012 Ram 3500 Big Horn, crew cab, 8 foot box, DRW, with the "Max Tow" package that includes 4:10 gears. The truck hauls my 16,000 pound trailer with ease and is well below it's max ratings in every area.
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