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Old 07-26-2011, 09:36 PM   #1
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Tow Haul/OD

Here's my set up.
2006 Chevy 2500HD 8.1 - 3.73
2011 XLITE 28BH

According to the manual GCWR of truck is 20,000 LBS
GVWR of TT is 7580lbs
Curb weight of 2006 Chevy is 5750 lbs

According to the owners manual I can haul in OD if I'm under 75% of GCWR of 20,000 lbs. Thus I can tow in OD if I'm under 15,000lbs GCWR according to the owners manual.

If my calculations are correct I have 1670 to play with after taking into account the GVWR of the TT and and the curb weight of the TV. I realize curb weight does not include passenger weight. So if I take me, the wife, and 3 kids that's 560lbs. I still have about 1100lbs to play with in regards to loading up TT and TV to stay under the 15,000 lbs. Would I be pushing the limits with my tranny and tv if I tow in OD at cruising speeds?? It would drastically improve my gas milage if I can safely tow in OD. I mostly tow in very flat farm land terrain.
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Old 07-26-2011, 10:04 PM   #2
Arn
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The purpose of the tow/haul mode is to lock it out of OD so your tranny doesn't keep changing or searching for gears. That will overheat your tranny. If you can tow in OD without your tranny constantly changing gears, then tow in OD.
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Old 07-26-2011, 10:22 PM   #3
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[QUOTE=Arn;121133]The purpose of the tow/haul mode is to lock it out of OD so your tranny doesn't keep changing or searching for gears. That will overheat your tranny. If you can tow in OD without your tranny constantly changing gears, then tow in OD.[/QUOTE

On most vehicles I have driven the tow/haul just reprograms the shift points for towing.

to the op, I would say you should be fine in OD
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Old 07-27-2011, 06:06 AM   #4
Arn
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[QUOTE=Acableguy06;121139]
Quote:
Originally Posted by Arn View Post
The purpose of the tow/haul mode is to lock it out of OD so your tranny doesn't keep changing or searching for gears. That will overheat your tranny. If you can tow in OD without your tranny constantly changing gears, then tow in OD.[/QUOTE

On most vehicles I have driven the tow/haul just reprograms the shift points for towing.

to the op, I would say you should be fine in OD
True. My point was meant to be that you very seldom will get it into OD unless you are a heavy foot. At least that's my experience. I've towed for quite a distance without ever hitting OD. Therefore, tow in OD.
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