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Towing in overdrive ?

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Old 03-01-2010, 12:33 AM
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Towing in overdrive ?

I was wondering what everyone thought about towing a travel trailer, 8k lbs, in overdrive while traveling on flat hiways? Is it not a good idea? Or if I watch my trans temp am I ok?
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Old 03-01-2010, 12:41 AM
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Originally Posted by crazymut View Post
I was wondering what everyone thought about towing a travel trailer, 8k lbs, in overdrive while traveling on flat hiways? Is it not a good idea? Or if I watch my trans temp am I ok?
As long as the TC is locked up and the tranny is not hunting, I say go for it. Keep an eye on EGTs too.
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Old 03-01-2010, 12:42 AM
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You can tow in overdrive all day long every day, and it won't hurt a thing.

If it's gear hunting, then lock it out of overdrive. The gear hunting under load is what hurts the trans.
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Old 03-01-2010, 12:48 AM
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Thanks for your responses. It is not a stock trans either, it's a John Woods towmaster trans.
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Old 03-01-2010, 12:54 AM
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Then your more than covered with that trans Terry but I tow my TT in OD(stock) and watch with the gear searching. Like Curtis said, all day long..
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Old 03-01-2010, 12:55 AM
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I usually hold it out of od till i know that I'll be above 50 mph for more than a mile then I'll let it shift it into od. I will hold it out if it hunting Also like others said. My stock trans lasted 290k of heavy towing and snowplowing.
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Old 03-01-2010, 01:03 AM
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I did try it today for awhile on my way home from camping once I was out of the hills on straight flat roads. I did notice a drop of about 5 degrees on the trans. I didn't look at the egt's since the engine was only at 1900 instead of 2500 now.
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Old 03-01-2010, 06:07 PM
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I tow with with OD and cruise control on.
I made an 80 mile round trip doing it again today.
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Old 03-01-2010, 08:44 PM
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I very rarely two in D. Like they said, as long as it is not hunting for gears I let it be. If it is hunting gears I try and control it with that skinny pedal on the right before I take it out of OD.
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Old 03-01-2010, 08:57 PM
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I think you got your answer but another yes vote for towing in OD as long as you keep the RPM's around 1800-2000. That's my truck's sweet spot for power/low EGT's.
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Old 03-02-2010, 01:24 AM
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Originally Posted by Ponyboychris View Post
I think you got your answer but another yes vote for towing in OD as long as you keep the RPM's around 1800-2000. That's my truck's sweet spot for power/low EGT's.
That was the rpm range I found to seem like a sweet spot also. Cruising at about 63 to 65 mph. It also seemed to almost be running easier than normal driving without a trailer.
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Old 03-02-2010, 04:44 AM
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My RPM sweet spot. 2k about 67 MPH. Pulling 10k 5th wheel. In OD. On Cruise.

I will bump off cruise when i see boost gauge rising.. About 10-12psi it likes to kick out of OD and scare the crap out of us.. Want to make a mode up for that some day. Seems that 10-12psi is consistent to cause the trans to kick out of OD. My EGT will never go above 1200.
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Old 03-02-2010, 11:32 AM
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As said, there is nothing wrong with towing on OD, but it doesn't mean it has to be the best way.
I did tow a trailer with a vehicle that had trip computer showing instant mpg.
Having 5 speed auto -I was playing with it being bored driving with low speed limit in CA.
On some occasions dropping a gear was bringing increase in mpg -also giving much better response when I needed it. Following tall semi could give me 15% increase, but that is tiring.
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Old 03-02-2010, 01:11 PM
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Quote:
Originally Posted by Kajtek1 View Post
I did tow a trailer with a vehicle that had trip computer showing instant mpg.
The trip computer isn't considered really accurate at all. Hence it is referred to as the "lie-o-meter"
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Old 03-02-2010, 02:38 PM
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Quote:
Originally Posted by yamaguy View Post
I usually hold it out of od till i know that I'll be above 50 mph for more than a mile then I'll let it shift it into od. I will hold it out if it hunting Also like others said. My stock trans lasted 290k of heavy towing and snowplowing.
That's one of the great benefits of having a custom tuner with tow tunes. It won't shift into OD until there's a certain mph that's met. I know mine won't shift to OD in my tow tunes until I get to over 55mph, and then it still won't shift into OD if I'm still accelerating or have a significant load on the TPS, such as pulling a small grade. Very nice.
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