337RLS with 2011-2014 2500HD... anyone with this combo?

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I posted several months ago asking questions about the 303, 6-1/2' truck beds and slider hitches. Things have progressed to the point where we are ready to sell the house and go full-time sometime within the next year. We already have a 2013 Sierra 2500HD 2WD SRW with the Duramax/Allison drive-train (and only 10,000 miles on it at this time). We can't really afford or justify selling or trading up to a 3500 or 4500 series truck. We still want to stick with a Grand Design units and have our sights set now on the 337RLS for the extra space and amenities for full-timing. We've had the truck on the CAT scales, have done the weight math, and - if we're careful - can stay safely within the remaining load limits for the truck and rear axle. (We'll never get anywhere close to the max GCVWR for the truck due to limitations on pin weight.)

The questions I want to ask today are these:

1) I measured a 337RLS today and, sitting fairly level, the distance from the ground to the load-bearing surface on the pin box (in its highest position) is only 44". I checked and the axles are already under the springs, too. If anyone has this combination, were you able to able to get the trailer level when on the hitch?

2) The second question is somewhat related to the first. Most slider hitches (including the Pull-Rite) add 3"-4" to the minimum height of the hitch plate from the bed. For this reason, I would rather go with a non-slider hitch in order to have a wider range of height adjustment do deal with #1 (above). I've not clamped 1x2s together to simulate the pin and front of the trailer, but talking with my dealer leads me to believe that, with a 6-1/2 foot bed, the extended pin box and curved/indented front cap on the Reflection, I wouldn't need a slider hitch for anything except an extreme jack-knife situation (and I'm NOT a former big-rig driver who might try something like that!). Is anyone pulling a Reflection (they all seem to have the same pin box and front cap) with a 6-1/2 foot bed without a slider? If so, how's that working for you?

If anyone owns a 337RLS and would like to chime in on its suitability for full-timing, what you do/don't like, or other experiences you've had, I'd like to hear about that, too.

Thanks in advance,

Rob
 
Rob, I can't speak for the short bed, but I have a 96' F-350 4×4 crew cab, and our 337rls sits level with about 7" between the bed rails and trailer. I have a 16k High Jacker non sliding hitch. I was worried about ride height too until I hooked up to a Reflection and Solitude at the dealer to check it out. I can still go up 1 set of holes, and down 2 on the hitch. I didn't have to mess with the pin box adjustment at all.
 
Rob, I can't speak for the short bed, but I have a 96' F-350 4×4 crew cab, and our 337rls sits level with about 7" between the bed rails and trailer. I have a 16k High Jacker non sliding hitch. I was worried about ride height too until I hooked up to a Reflection and Solitude at the dealer to check it out. I can still go up 1 set of holes, and down 2 on the hitch. I didn't have to mess with the pin box adjustment at all.

Thanks, Sean. Do you have any idea what your bed height (distance from bed to ground) unloaded? My understanding is that the beds in the late model trucks are MUCH higher than they were in the '90s or first half of the 2000s'.

Rob
 
The 337 will make your truck squat 2", with 8" of bed clearance you will be 4" nose high. I actually installed correct track over the existing correct tract to gain 2" lift. To do what I described involves some fab work, so I don't know if you want to go that route or not. I cut the hanger bends that hold the correct tract cam in place off my trailer. You can't install the aftermarket correct track on top of correct track. After cutting the factory ears off the factory hanger you then have a smooth spring hanger to apply the aftermarket correct track on. Since the factory welded correct track hanger has a slotted adjustment hole at the bottom, and you put the aftermarket bolt through it you must weld the correct track to the factory hanger. This sounds like a lot of work to gain 2" of height, but I am very concerned with towing as level as possible, I am now very close. If you are not overly concerned, you will be around 4" nose high if you require 8" bed clearance. If you can get by with less than 8" bed clearance, you can get close to level right away.
 
Just so you have some real numbers, I've weighed our 337 on our last trip...2820# pin weight and 12880# total. That's quite a bit more than I expected thinking that we don't load too heavy but with all the room, it's easy to do. I'll be putting it on a diet and trying to re-position some things.

With the Ford 6.75" box, I've got into some tight spots without using the slider...have more clearance now as I've installed a B&W Patriot hitch with adjustment front to back. I'm now 4" further back than I was and still just ahead of the axle centerline.

Dave
 
That is some heavy pin weight Dave, I suspected something around 2500lb. I need to make a trip to the scales now, thanks for the information.
 
That is some heavy pin weight Dave, I suspected something around 2500lb. I need to make a trip to the scales now, thanks for the information.

That's what I would have guessed too but there just isn't much storage behind the axles to offset weight added in the front storage so pin weight % increases.

Dave
 
I have a 2013 GMC Sierra 2500 extended cab 4X4 6.0 gas Z71 package with the 6 1/2 ft. bed. After I bought this truck I filled up the gas tank and went to the town scales. My payload capacity is 2760 lbs. I have a PullRite Super 5th 16K Hitch. We have a 303. Hauled all summer without a slider. No problems. If I had to cut sharp I would just keep an eye on my corner. Never was concerned. I installed AirLift air bags on my truck before I got my 303. My setup rides awesome going down the road.
 
We own a 337rls. Absolutely love it!! Must have upgrades: maxxfan/fantastic fan in bathroom and 2nd a/c if plan on being in hot/humid climates. Oh, and mattress upgrade or foam topper. Otherwise perfect, very comfortable, plenty of space, and you don't have to have a huge truck to pull it.
 
Dave I'm just curious about your pin weight. Do you have a washer/dryer? We've never weighed our rig but I'm thinking maybe we should. I try to keep our master closet on the empty side for traveling. And we don't really put anything in the under bed storage. And we don't have a washer/dryer. Or bedroom AC.
 
Thanks, everyone. I'm starting to second-guess myself, though, after hearing the pin weights folks are measuring. With only 2,480# left for GVWR (payload - despite having 16,980 GCVWR left for the whole rig), I'm thinking the 337 is going to be too much on the pin for my truck. Perhaps it's time to start looking at the 303 again...

Rob
 
Regardless of our pin weight (whatever it may be), we have been very pleased with our 2013 F250 6.7 Super Duty diesel and 337 Reflection combo. Pulled it on a long trip to camp from Kansas to Colorado and had no problems whatsoever. For future trips we'll probably just try to minimize the weight in our master closet and basement storage area, maybe rearrange stuff a bit like Dave and Monica recommended. I did notice that our trailer pulls much easier when we don't have that closet loaded to the max with clothes, etc.

We considered the 303, and really liked the looks of it, but the larger shower, and bed slide with windows in the 337 won us over. No regrets. The new Reflection 317 looks nice too although I don't think the weights are that much different than the 337.
 
I will second your comments Happy Kansans, we just returned from our first long distance trip to Austin and Houston from Iowa and were very happy with our 337 and 2013 F250 6.7 diesel combo also. We also looked at the 303 as I was concerned about the 337 pin weight. We haven't regretted our decision once, we love our 337. Being 6'4", the larger bedroom, shower and closet have been very nice. It seems to pull just fine loaded or unloaded. I will try to move more weight off of the pin on future trips to optimize safety and handling based on other comments. All things considered though, we are very happy with our f250 and 337.
 
The weght is one of the main reasons we first looked at Reflection 337. As our truck is getting older, I do not want to have to buy another one ton diesel dually. It can be towed by a 250. And in our case, seriously considering a gas truck. Our 7.3 (supposed to be the good one!) at 219,000 miles had to have $8,000 worth of work. We bought it new, changed oil every 3,000 miles (not 5,000 like owners manual says) and meticuously maintained everything else. Expected 3-400,000 miles before major work. Repair $ plus initial extra $7,000 for diesel engine, not to mention diesel fuel costing more than gas since 2002 when we bought truck, and oil changes costing way more than gas engine, has us seriously doubting the disel engine is worth all the extra costs. Might have to drive slower when we go to the mountains twice a year, but we are on vacation! Any input or experience towing 337 with gas truck welcome.
 
I pull our 2014 337 with a 2011 F250, Crew Cab, 4x4, gas engine, short bed, w/slider hitch, and air bags and it does OK. There are times I wish I had a diesel for the better mpg, but I can buy a lot of gas for the price per gallon difference. I would not be without the slider hitch. I find myself in tight spots both turning at gas stations and backing into sites quite often. I have never weighed the rig. I never tow with a load of fresh water and try to limit heavy stuff in the bedroom and basement storage. I doubt I'll ever take this rig over the Rockies, but it does OK through the mountains of western MD, VA, WV, and TN.
 
Tow a 337 with what's listed in my signature. The V10 isn't bad as it makes peak torque at 3200 rpm as opposed to 4000+ of current V8's. Towing fuel mileage is 8 - 8.5 mpg...12-14 non-towing. We're maybe a little heavier than some at 12800# loaded but the V10 handles it adequately. Would like the diesel exhaust brake for those long, downhill grades.

Dave
 

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