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Old 07-13-2013, 06:43 AM   #1
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Towing a 5450lb HTT with a 1/2 ton Silverado

Yes, another is this going to be ok thread.

We are considering moving up to a larger HTT, it's not a Jayco but a Starcraft 229TB with a GVWR of 5450lbs. As is noted in my sig, we have a 2010 Chevy Silverado, 5.3L w/3.42 gear ratio.
I have looked at all the numbers and this seems to be well within the trucks range, I have never towed anything this long or heavy though, so it's making me a little nervous.

Our TV's GCWR is 15000lbs, so assuming both TV and HTT at their GVWR of 7000lbs and 5450lbs the max total would be 12450lbs, I think it would actually be a little less. The increase in TW will be offset by all the stuff we had to haul in the back of the truck due to the low CCC of the 17Z. Most of this can now go in the trailer.

Just looking for thoughts/opinions.
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Old 07-13-2013, 08:26 AM   #2
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Going by just the numbers it looks like you should be fine. The only concern may be the 3.42 gear ratio. How are your transmission temps with your current HTT? Looking at the specs you will be almost doubling your trailer weight which will definitely add pressure on the trans.
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Old 07-13-2013, 09:09 AM   #3
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I agree with Power247, your transmission is what is going to get the work here. Monitoring your trans. temps and making sure you are running on the cool side is key. There are things you can do in the aftermarket to help your trans. run cooler. An auxiliary cooler for your trans. isn't a bad idea at all. It is a cheap insurance policy against cooking the transmission.
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Old 07-13-2013, 09:18 AM   #4
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I am looking into upgrading the tranny cooler, the stock one is really small, most of the aftermarket ones I've seen are much larger. It generally runs in the 185-200 range depending on conditions, this is according to the built in temp sensor.
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Old 07-13-2013, 09:24 AM   #5
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It has a 6 speed tranny thats why gm went with the 3.42 gears, it actually will tow more than a 4 speed with 3.73 or 4.10's Def put another tranny cooler on the truck, keep the one u have and piggy back off it so u can make use of both coolers
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Old 07-13-2013, 09:32 AM   #6
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Quote:
Originally Posted by amabee View Post
I am looking into upgrading the tranny cooler, the stock one is really small, most of the aftermarket ones I've seen are much larger. It generally runs in the 185-200 range depending on conditions, this is according to the built in temp sensor.
185-200deg sounds a little high to me. Maybe someone else can chime in on the temps. I looked in my owners manual for our truck and normal operating range for the tranny is 140-160deg. Out TV is a 2500HD so that might be the difference.
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Old 07-13-2013, 09:42 AM   #7
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I don't really know what "normal" should be, I see nothing in our owners manual. It runs about 160-180 when it's not towing, again depends on outside temps.

Ok, did some reading in the owners manual and found the normal temp, it is 160-200.
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Old 07-13-2013, 09:56 AM   #8
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snip........I have looked at all the numbers and this seems to be well within the trucks range, I have never towed anything this long or heavy though, so it's making me a little nervous......snip
Take out the weight guess work and weigh your TV under loaded conditions at a CAT scale. Subtract the CAT scale weight from your TV's specified GVWR, and the remaining weight is for your HTT's loaded tongue weight and any other TV weight not accounted for at the CAT scale.

As a reference..., one's loaded tongue weight should be 10% to 15% of the trailer's actual loaded weight (or expected loaded weight). If the overall trailer length is 26ft or more use 13% to 15% for enhance TV handling.

Bob
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Old 07-13-2013, 11:04 AM   #9
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The last time we weighed, the pickup was at 6100lbs, leaving 900lbs for TW etc. My "guess" is a loaded weight of 5200lbs for the HTT, at 12% the TW would be ~625, at 13% it would be ~675, real life I am thinking 650-700lbs, which leaves 200lbs. So their wouldn't be much room for anything in the bed, but that's ok as I have figured moving that weight to the trailer.
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Old 07-13-2013, 02:09 PM   #10
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Yeah watch the payload weights and you will be fine towing that unit IMO.
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