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Old 04-17-2013, 10:27 PM   #1
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Location: Southeastern MA
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TV/TT Combination Opinion

Weíre currently waiting delivery of the 2013 White Hawk 27 DSRL we ordered in January that we'll be towing with a 2012 Chevy Avalanche we bought last August. Based on what Iíve read so far on the forum Iíve determined that for this TV/TT combination, Iím looking at a TT with 5,400# dry weight, 7,500# GVW and a 610# dry hitch weight. I figure the hitch weight might increase to about 725# with a 1,000# payload, by maintaining the same 11.3% of the GVW on the tongue. The Avalanche has a 5,969# curb weight a 7,200# GVW, a 1,263# cargo capacity and a max TT weight rating of 8,000#. Iím thinking I should have about 500+ # of load capacity to spare and be well within the tow rating. The Class V factory installed hitch is rated for 1,100# with a WD hitch and the dealer is including a DrawTite HP Dual Cam WD hitch with torsion bars, though not sure what weight rating. I would like to know how people feel about this combination and whether or not I can expect to have any problems with TT sway. BTW, the Avalanche is equipped with StabilTrak Electronic Stability Control and the manual says that the TV will ďsenseĒ sway and automatically take corrective actions (reduce speed and brake) to stop it. Sounds nice in theory, not sure if it will work or help in reality and that I better depend more on having the right towing setup.

'12 Chevy Avalanche LS 4WD, 5.3L V8, 3.42 Ratio, HD Cooling
'13 Jayco White Hawk 27 DSRL
'95 Coleman Chesapeake
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Old 04-17-2013, 11:17 PM   #2
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Hey Spray! We have lots of knowable folks here that can jump right in and help. Welcome!

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Old 04-18-2013, 12:18 PM   #3
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We have your TT and pulled it first with a Silverado 1500 crew with the 5.3 motor and 3.73 gears. We picked it up from Middlebury, Indiana and towed it home to Missouri. It did fine averaging 7.5 mpg. In doing the math I decided that if we loaded the TT and the TV with four people and gear, it would likely push the limits of the 1500.

I sold the 1500 and bought a 2500hd with the 6.0 and 3.73 gears. So for, I notice that I average 8.5 mpg towing and feel more confidant in my breaking etc. Camping local, I would have been ok keeping the 1500 but we want to be able to cross the Rockies with more confidence. Or a false sense of anyway.
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Old 04-18-2013, 06:49 PM   #4
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It appears that you have a good understanding how the TV & TT weights work with each other, and focusing on loaded weight conditions is a smart move. IMO your TV/TT combination is doable, but one's loading habits will influence the outcome do to the limited TV payload capacity. To add to your do-diligence I offer the following for consideration:

* To dial in your weight assumptions, take your "loaded" (simulate going camping weight) Avalanche to a CAT scale and weigh it. Subtract the CAT scale weight from your TV's GVWR of 7,200lbs, the delta is the "actual" TV weight remaining what you have to work with.

* Your published Tow rating of 8,000lbs doesn't reflect the TV's actual tow rating, please note: https://www.jaycoowners.com/showthrea...uot-Tow-Rating

* Once you have the new TT, take your TV/TT under loaded conditions to the CAT scale. IMO depending on your personal loading habits one could exceed some weight limits with your TV/TT combination. CAT how-to: https://www.jaycoowners.com/showthrea...igh-Your-tt-tv

* Although it's possible to maintain a 11% loaded tongue weight, but it will take considerable effort to maintain. Most find that a 13% to 15% is more common and desired....., especially with the longer TT's.

* TT dry weight is not the actual "ship weight" (yellow sticker on TT), I would add another 350lbs...., as an example: (Dry 5,400lbs) + (Ship Delta 350lbs) + (Dealer adds: battery/WDH/etc. 125lbs) + (TT cargo 1,000lbs) = 6,875lbs loaded weight (11%=756lbs, 13%=894lbs, 15%=1,031lbs)

* IMO the ideal HP Dual Cam WDH weight rating should be 1,200lbs.

* Keep in mind that upon departing the RV dealership the WDH was adjusted under "unloaded" conditions.., once the TV/TT is under "loaded" conditions the WDH in most cases will require a re-adjustment.

* Assuming that the TV/TT combination is loaded within it's weight limits and the WDH is sized/adjusted correctly, you should not experience any sway under normal towing conditions. Should a sway event arise you will be in the best position to control it's effects.

Hope this info helps.


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Old 04-20-2013, 10:35 PM   #5
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Spray56, I'm pasting the content of a post I made after picking up our Whitehawk 27DSRL on April 3, below. Hopefully this will be helpful for you. We still have not made our first outing, it is planned for May 17-19; and with luck I can swing by a CAT scale in New Braunfels, TX to get the loaded weight. Thus far, we love the Whitehawk, time will tell how it all pans out! Best of luck with yours!

"In the meantime, I'd like to report that we hauled it just under 1,300 miles from Middlebury, IN to our ranch north of Dripping Springs, and averaged 8.44 MPG over 7 tanks of gas. We hauled 'er on Interstate highways almost the entire distance, and drove between 65 & 75 mph depending on the speed limits. (We averaged 15.2 to 16.2 MPG enroute to Middlebury, driving a wee bit faster.)

I weighed the truck on the way north in Elm Mott, just north of Waco, TX at a CAT scale. Not knowing how the process worked, I parked the truck across #2 & #3 weigh sections, and stood on #1 to reach the call button. Consequently, the steer axle weight reported at 240 lbs, the drive axle (front of truck) reported at 3960; and the trailer axle (rear of truck) reported 2720 for a gross of 6920 lbs. This startled me, I figured the truck would weigh far less. But after discussing it with my buddy, we decided that my "typical" ranch truck had quite a bit of extra weight. Things like boomers, 16' tow chains, Ranch Hand headache rack and front end replacement; tool box full of tools, etc. Plus us at 200 lbs each (actually, I weigh around 217 according to last physical), which made me wonder about accuracy of the #1 weight.

On the way back, we weighed in Marion, IL at another CAT scale, in the exact same fashion. This report showed 220 lbs for steer axle (me) 3820 lbs for drive axle (front of truck) and 8580 lbs for trailer axle (rear of truck and trailer). Gross weight of 12,620 lbs. Sticker from the Jayco factory showed weight of trailer to be 5,933 lbs.

So far, we're well within the parameters listed in the owners manual of 8,300 lbs for gross trailer weight; and 15,000 gross combined vehicle weight. And, the truck/trailer drove/pulled very well. The difference in towing between my previous TV (2000 Silverado, 5.3 & 4-speed automatic) and current vehicle with the 6-speed Allison is huge.

Thus far, I'm well satisfied with the TV/TT combo, and look forward to making some trips on non-Interstate highways at a slower pace. "

2014 Chevrolet Silverado 3500HD Crew Cab, long box, Duramax and 3.73, SRW
Equal-i-zer 1k WDH, 2013 White Hawk 27DSRL

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Old 04-21-2013, 06:54 AM   #6
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Regarding towing speed. The TT "ST-type" tires are speed rated for a max of 65 mph. exceeding that you run the risk of a blow-out. You will find your fuel mileage will be better if you can hold your speed to 60 mph max. That is my approach.
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Old 04-22-2013, 08:12 PM   #7
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2X to David472's comment about tires and speed. My 06 Tundra with 4.7 litre engine worked hard to pull our 26BH, which is 1000# lighter than the 27 DSRL. '12 Tundra pulls the 27 DSRL just fine with approx 10 MPG. Got 8 MPG with the 06 Tundra. Your 3.42 real axle and
the additional weight of a 4X4 will probably have your truck working pretty hard, especially on hills. When you get it loaded up take it to a CAT scale and see what it all weighs. For a better towing experience try not to exceed 85% your gross combined vehicle weight. I suspect that
you will be close to the limits. I think the truck's stability control you mention is accomplished by the rear brakes. Good luck with your new rig!
2012 Toyota Tundra 5.7 Litre DoubleCab
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2013 Jayco White Hawk 27DSRL
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Old 04-23-2013, 07:04 AM   #8
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Focus on keeping the Avalanche weight under the gross and rear axle ratings. Pack stuff in the trailer. I had a 2012 Suburban (23k miles on it), 2012 Avalanche (15k miles on it), and 2013 Suburban (19k miles on it). All had the 5.3 and 3.42. I used them to tow stock trailers, horse trailers, and utility trailers. (Came close to trying my trailer, but would have been in trouble for exceeding the ratings if anything happened.) They did fine. I was problably close to max on one trip with a 20ft stock trailer, 9 llamas, show equipment, and 1000lb of feed.

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Old 04-23-2013, 06:38 PM   #9
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Thank you to everyone who has replied to this post so far an offered their opinion. I know the first thing I'm obviously going to do is hit the scales once I take delivery and load everything up. I have a public truck scale about 45 minutes from the house where I assume they have the three separate scales, otherwise, I may have to try the local junk yard here in town with their single scale. Anyways, I wanted to expand on the background info I provided and mention that my manual states I have a 14,000# GCWR, which I would exceed by 700# if I were to hit the GVWR for the TV and TT. I also didn't mention that the 2012 Avalanche has the 6-speed transmission with the tow-haul mode feature. I found in a post on ChevyTalk.org the following information about net gear ratios with the 6 sp trans and the 3.42 axle ratio versus other trans and rear end ratios:

Final drive ratio's.......

6 speed w/3.08 ratio
1st: 4.02 x 3.08 = 12.38
2nd: 2.36 x 3.08 = 7.27
3rd: 1.53 x 3.08 = 4.71
4th: 1.15 x 3.08 = 3.54
5th: 0.85 x 3.08 = 2.62
6th: 0.67 x 3.08 = 2.06

6 speed w/3.42 ratio
1st: 4.02 x 3.42 = 13.74
2nd: 2.36 x 3.42 = 8.07
3rd: 1.53 x 3.42 = 5.23
4th: 1.15 x 3.42 = 3.93
5th: 0.85 x 3.42 = 2.91
6th: 0.76 x 3.42 = 2.60

4 speed w/3.73
1st: 3.06 x 3.73 = 11.41
2nd: 1.75 x 3.73 = 6.52
3rd: 1.00 x 3.73 = 3.73
4th: 0.70 x 3.73 = 2.62

4 speed w/3.42
1st: 3.06 x 3.42 = 10.46
2nd: 1.75 x 3.42 = 5.99
3rd: 1.00 x 3.42 = 3.42
4th: 0.70 x 3.42 = 2.39

Based on this and what they're saying on the other forums, the 3.42 is equivalent to the lower (3.73 and 4.10) axles they used to make available when considering the new 6-sp trans versus the older 4-so trans.

One other question I had is with regards to Nighthawk 96's comment on not exceeding 85% of the GCWR. I was speaking to a Chevy service department today and they wondered if you meant with regards to the dry weight when looking at trailers in order to allow enough capacity for gear. Otherwise, doesn't the manufacturer build some room for error in the 14,000# GCWR specification listed in my manual?
'12 Chevy Avalanche LS 4WD, 5.3L V8, 3.42 Ratio, HD Cooling
'13 Jayco White Hawk 27 DSRL
'95 Coleman Chesapeake
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Old 04-24-2013, 08:50 AM   #10
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You are indeed correct on the 6sp and 3.42 axle. It provides a great match.

As for GCWR, I believe that you can go to 100% without issue. It has that rating for warranty and performance.


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2011 Silverado CC 2500HD
2011 Jayflight G2 32BHDS
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