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Old 09-17-2015, 09:23 AM   #1
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4 wheels or 6 wheels

I'm looking at a 2016 GMC 3500HD with a diesal. They have the 4 wheel trucks and the dullies. I'm guessing one difference would be a different axle gear ratio which would affect gas millage and better hill climbing. Is one really better at handling a 5er. Any comments would be appricated.
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Old 09-17-2015, 11:01 AM   #2
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Dually trucks are always better at handling trailers. More stable. The rear axle ratios may or may not be different for a SRW vs. DRW trucks, just depends how it was built.
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Old 09-17-2015, 11:08 AM   #3
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4 or 6 wheels

I have a 2015 Chevy dually love it for towing I base all my towing mpg at 10 I wish I had have bought one in 05 when we started full timing.,
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Old 09-17-2015, 08:48 PM   #4
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I have a dually and a SRW truck. I can't say a DRW is better for towing trailers unless its heavy.
.
I prefer the DRW for a trailer over 15k and the SRW for under 15k.

The GMC one ton DRW and the one ton SRW have the sale engine/transmission/front and rear axles and same gear ratios.

The difference is in carrying weight.
The DRW has those big 9375 RAWR/4 rear tires for 6k plus payloads.

The one ton SRW has a 7050 RAWR/2 tires with around 4k payload.
All depending on the right truck std and option selections.

Use this handy clicky link to all of GM trucks specs.
It also has a weights calculator that figures all the std and options weights. Eliminates guessing at a trucks actual front and rear axle weights. GM Online Order / Reference Guide
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Old 09-20-2015, 12:51 PM   #5
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The biggest reason for the DRW truck is STABILITY, Cross winds do not affect you near as much in a DRW truck. This truck still takes some getting used to driving it as compared to an econobox, I drive a DRW truck all day at work as well as my truck, so it is same-same to me, but it does not fit everywhere!
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Old 09-20-2015, 03:19 PM   #6
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I had a 2011 3500 crew cab short bed SRW. Loved it! 2011 is the same engine and drivetrain as the current models.
Anyway, my 2011 3500 SRW had a payload just shy of 4k lbs. Subtract two people in the cab and the weight of the Pull-Rite Superglide hitch and anything else loaded into the truck and that then allowed for a loaded pin weight of any fiver I'd pull to 3400 lbs. That was fine for my Cameo at the time.
I traded the Cameo for a Lifestyle LS36fw. From talking to others that have that model I know the SRW truck would have been at its payload limit. That is mainly due to the weight limit of the stock 18" tires.
With that in mind, I traded the 2011 SRW for a 2013 DRW with a payload of 5100 lbs. I'm glad I did. The scaled weight of the Lifestyle loaded for a 3 night trip is 3400lbs.
I love the dually and it is very stable with the 15500 lb Lifestyle. Good luck.
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Old 09-20-2015, 03:56 PM   #7
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My single rear wheel diesel 3/4 ton has a fifth wheel towing capability of 13,200, and a 2,500 lb. weight carrying capability.


I put air bags on the rear springs, and held myself off to a 11K lb. dry weight fifth wheel trailer with 2K lb. kingpin weight. That's about as much as I want to tow without duals.


Unfortunately, many full size fifth wheels after all the peoples' stuff will go 3,500 lbs. kingpin weight and over 14,000 lbs. total weidht. My 3/4 ton won't handle it.


Since duallies just cost about $1K more, they're actually a better value than my bastard 3/4 ton truck.
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Old 09-20-2015, 09:54 PM   #8
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My dry pin weight without clothes/food or water on board is 3420 lbs, dry gross combined is 25240. On my DRW my max rear axle weight is somewhere around 9740 lbs. The DRW option was only 1280.00 on my truck. Not a lot of money for a big difference in a tow vehicle.
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Old 09-21-2015, 04:17 AM   #9
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Agree that small to mid sized 5th wheels SRW will work and for larger and heavier 5th wheels a dually is needed.

One thing I notice is all SRW trucks towing 5th wheels tow slower than I do in my DRW truck. I like the guys that say they tow heavy with SRW trucks but drive slow.
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Old 09-21-2015, 05:33 AM   #10
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Quote:
Originally Posted by bucsfan116 View Post
I'm looking at a 2016 GMC 3500HD with a diesal. They have the 4 wheel trucks and the dullies. I'm guessing one difference would be a different axle gear ratio which would affect gas millage and better hill climbing. Is one really better at handling a 5er. Any comments would be appricated.
The big question is what do you want to tow? The main reason for buying a dually is higher payload. If you're towing a heavy fiver, you need may a dually because of the high pin weight. If you need a dually, you NEED it regardless of gas mileage or hill climbing or the inconvenience of having to park in the back row of the Walmart parking lot or anything else.
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Old 09-21-2015, 01:01 PM   #11
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"I'm guessing one difference would be a different axle gear ratio which would affect gas millage and better hill climbing"

"ALL" GM Diesel 2500/3500 SRW and DRW have 3:73 gears!
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Old 09-21-2015, 01:32 PM   #12
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Another advantage to a dually is when you blow a drive tire, with a dually no problem to get it stopped and to a safe place to repair, with a single rear best case is you have to fix it right where you are and worst case you need a wrecker to put the rig back on it's wheels. In over 5 million miles in a big rig I have seen only 1 dually that lost it when a tire blew and too many SRW's to count, plus the dually is more stable in a cross wind.
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Old 09-21-2015, 02:58 PM   #13
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It seems many folks that buy SRW truck end up with a larger trailer and then need to buy the bigger truck also. Seems to me get more truck now, you won't have to later.
I bought that way, but haven't gotten the bigger trailer yet, but I am ready for it.
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Old 09-21-2015, 08:08 PM   #14
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I have a srw 3500 trl 13500 loaded doesn't sway go slow and l agree that leavy trls should have DRW but if you don't need it why buy it ? 2 more tires to buy
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