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Old 03-04-2013, 10:44 AM   #11
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They have a 6 speed trans thats why they get the 9500 rating with a 3.42.
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Old 03-04-2013, 10:59 AM   #12
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Travis, my Chevy sounds very similar to yours; it has all the HD towing options (coolers, synthetic lubricants, etc.), short bed crew, LC9 (E85) motor (326HP), stock size wheels and tires, 6 speed Allison, plus 3:73 gears (!), 326HP and 348lb/ft torque. The information I have is that with all these it will pull 9500#, but your maximum calculated at 7600# has some merit. This is of course, with a properly setup WDH and weights properly distributed. This 7600# number is possible, but slightly high IMHO. It is a matter of torque and power range of this engine. It is possible to overload that 3950# rated rear axle if you put anything heavy in the bed.

The 21RR I pull, is maybe 6500# going camping, with 750# on the tongue; it is ALL the trailer I would ever pull in the low hills with this truck. This would be with a bike, but no water. I would recommend putting nothing in the bed. What I don't like about even pulling with my truck (the 21RR) is that you must keep the RPM above 2500 to 3500 RPMs. It will many times be in as low as 3rd gear, rarely for sure, but much of the time in 4th for the slightest grade; never ever past 5th. I have been on 16% grade and it would barely pull 2nd gear at 22-25MPH at near wide open throttle. This would be at maybe 3000 RPM... It will cook the transmission doing this. The ambient temp was around 45 degrees and the tranny hit 290 degrees. I backed off when I saw this. So, another point is you can't be in any hurry.

I don't use tow/haul, never use cruise control; rather prefer to manually shift the Allison. As you know, if you manually select 4th it won't shift to 5th. Traveling and camping is supposed to be fun... the 5.3L simply is not fun pulling even 6000#. It has enough HP, so, if you wind the heck out of it, it will pull. But, again this is not fun for me.

I have pulled for 15,000 miles with this combination. I have a long history of pulling.

So, IMHO our pick'em'ups will pleasantly pull up to 5500#, again IMHO it takes a 3/4 ton past that, but at 8000# and up, you really need a diesel. Also, my truck is rated to get 21MPG highway... the best it has ever gotten is 18.1 MPG Interstate, 65 MPH, with cruise, flat highway; empty truck (tonneau cover only, which should have helped economy); no trailer. While pulling the 21RR at 60 MPH, it averages less than 10MPG (9.4 to 10.4). Hope this helps.

I am not sure how to edit this but 2012 I camped 163 days, but none so far this year... yet. Ready to go!! I have washed and waxed "the Wild One" however.
Did you do a gear change to 3.73? I thought the 3.73 was only available with the 6.2L engine. The Eco is not going to get 12-14 towing your trailer. More likely 10.
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Old 03-04-2013, 11:23 AM   #13
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Did you do a gear change to 3.73? I thought the 3.73 was only available with the 6.2L engine. The Eco is not going to get 12-14 towing your trailer. More likely 10.
You are correct on Eco mileage. I get 11 mpg towing at 60 mph.
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Old 03-04-2013, 11:24 AM   #14
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They have a 6 speed trans thats why they get the 9500 rating with a 3.42.
Yeah, you are right and my intuition was wrong. I bet that means a fair amount of towing in 4th and 5th; probably 3rd on the tougher climbs. But, I guess that is what gears are for!
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Old 03-04-2013, 11:29 AM   #15
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That sounds about right. IF you are only going to tow to close/local campgrounds you can probably push that number a little.
These numbers are based on what the vehicle can pull safely, why are you willing to push safety for shorter trips?
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Old 03-04-2013, 12:02 PM   #16
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FYI, this might be helpful.

Trailer Towing Guides | Trailer Life Magazine
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Old 03-04-2013, 02:12 PM   #17
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Thanks for all the input!

The trailer I am looking at has a dry weight around 5900 lbs. Dry hitch rate of 610 LBS. The GVWR on the trailer is 7500. I think I will be good with this TT and the set up on my truck. I also have upgraded the tires to some E rated tires. Thanks for everybody's input. I have gathered some great information.

Travis
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Old 03-04-2013, 03:15 PM   #18
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You'll be good with that trailer. Enjoy the new tt.
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Old 03-04-2013, 03:58 PM   #19
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Did you do a gear change to 3.73? I thought the 3.73 was only available with the 6.2L engine. The Eco is not going to get 12-14 towing your trailer. More likely 10.
I have read that, too. You can also find all kinds of numbers concerning payload / towing capabilities. I don't know if it was a special order, but it does indeed have 3:73. I can't crawl under it and read the tag to you (I might be able to share the VIN), because I traded it today for a Dodge 2500 Cummins diesel. I had edited my post to say 12MPG on the Eco, but it didn't come out that way, computers really don't like me. I have a friend who tows a fairly large Airstream with an Eco and really does get 14, but to think pulling a Wolf would have the same result would be indeed presumptuous of me. Haven't tried it, obviously, but I bet the Dodge will get 14 or better. I actually pulled it down the road and back... holy cow! the torque is awesome... a mere 800 lb/ft.
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Old 03-04-2013, 04:23 PM   #20
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My 2009 GMC has the same numbers as your 2012. Send me a PM and I'll forward you an Excel spreadsheet that will calculate everything for you.
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