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Bonjour
Newbie
Joined: 18 Oct 2014
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Posts: 27
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Topic: TV - RPMs Posted: 02 Dec 2014 at 10:14pm |
I'm basically new to towing and definitely not mechanically inclined. I noticed when we brought our 179 home the RPMs were generally running about 3000 vs. the normal 2000 on our Honda Odyssey. My concern was that this would put too much stress on the engine if run all day. (so far it has been towed less than 100 miles) I talked to the local mechanic today and he indicated that running at higher RPMs is to be expected and that the engine should handle it without a problem. He recommended not letting it go into overdrive and to constantly run it at D3 so that the transmission didn't slip too much. His view was that is much better to stress the engine rather than the transmission. Do others agree?
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JStrube
Groupie
Joined: 11 Aug 2014
Location: Atwater, CA
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Posts: 90
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Posted: 03 Dec 2014 at 1:24am |
Totally. 3000 rpm is not that stressful. It is better to rev than to lug. Less damage there. Also, the trans not locking is more likely to overheat. That is bad.
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2012 181G
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wildfire305
Groupie
Joined: 22 Jul 2014
Location: Erlanger, KY
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Posts: 85
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Posted: 03 Dec 2014 at 5:03am |
Welcome to the 12mpg club. Yes I second that. My Odyssey did fine with that, except I didn't use it as much as I should have. The transmission gave up Thanksgiving day, probably because 130k. Towing will shorten the time between rebuilding the transmission on any vehicle, but the Odyssey should be suprisingly capable. However, you will receive mixed opinions on this. One of the two mechanics at my shop laughed that I was trying to tow 3000 pounds and the other one argued with him that I should be fine. In europe, the same van is rated at 4500 pounds and all they do is move the wheel to the other side.
Higher RPM's are fine for the engine and will actually COOL the transmission. Being in the highest gear, D5, is great for fuel economy when not towing; but it will generate way more heat when towing. Heat is what kills a transmission. If only the Odyssey were capable of staying in 4th gear, that would get the best of both worlds. 3500 rpm may leave you with an uneasy or anxious feeling in your gut while driving, but the engine handles it fine. Food for thought - Generators usually run at 3650 rpm all the time.
Traded the broken Odyssey for a Durango V8. I only spent $1500 more than a tranny rebuild to get another vehicle. But I would have rebuilt the Odyssey if I still needed three car seats in a second. Only one child in car seat now. I miss my sliding doors already.
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2005 Dodge Durango 4.7 V8
OLD Tow Vehicle 2004 Honda Odyssey
2015 RP179 "73b"
OLD 2005 Viking Saga 2480ST popup
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Podster
Senior Member
Joined: 16 Sep 2014
Location: San Antonio
Online Status: Offline
Posts: 1108
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Posted: 03 Dec 2014 at 9:45am |
Originally posted by Bonjour
He recommended not letting it go into overdrive and to constantly run it at D3 so that the transmission didn't slip too much. His view was that is much better to stress the engine rather than the transmission. Do others agree? |
Yes, my owners manual suggests turning OFF the OD when towing a heavy load to prevent excessive transmission shifting caused by terrain and load. This will also keep your RPMs up to provide the torque needed to pull the load. I like to run at 2,800, but will sometimes hit 3,000. This will vary somewhat between different autos so after towing for a while you will find the comfort zone "sweet spot" on what works best for your setup.
Your mechanics share a typical disagreement where one will argue that towing is ALL about power and, of course, that's not true. It's really all about balance, power is only one element.
Good luck and Have Fun in that Brand New RP-179! 
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Cliff & Raelynn
Ranger 4.0/178
(1/2 ton 5,800lb tow capacity)
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techntrek
Admin Group - pHp
Joined: 29 Jul 2009
Location: MD
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Posts: 9062
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Posted: 03 Dec 2014 at 9:57am |
I agree that you are fine running at the higher RPMs. My prior TV was a Sienna and I saw the same thing. Kept it out of overdrive, and I actually found it ran smoother at 65 mph than it did at 60. Just enough extra forward motion to keep it from downshifting to 2nd on the smaller hills. When it went from 3rd to 2nd it was screaming!
Originally posted by wildfire305
... In europe, the same van is rated at 4500 pounds and all they do is move the wheel to the other side.
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Traded the broken Odyssey for a Durango V8. I only spent $1500 more than a tranny rebuild to get another vehicle. But I would have rebuilt the Odyssey if I still needed three car seats in a second. Only one child in car seat now. I miss my sliding doors already. |
What do you mean by moving the wheel? I missed our Sienna at first, loved having minivans for many years. Now I wouldn't go back from the big truck!
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David and Danette
podders Helping podders - pHp
Joined: 24 Nov 2009
Online Status: Offline
Posts: 1223
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Posted: 03 Dec 2014 at 1:08pm |
I to agree with all above and that I was told by a experienced mechanic that in towing it is not the engine that is your weakest link but the transmission. Techntrek I think wheel on other side was referring to England driving on the other side  of the road.
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2018 Vista Cruiser 19BFD (2018-
2012 Vibe 6503 (2014-2019)
2009 r-pod 171 (2009-2014)
Middle Tn
2014 Ram 1500 Quad cab
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wildfire305
Groupie
Joined: 22 Jul 2014
Location: Erlanger, KY
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Posts: 85
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Posted: 03 Dec 2014 at 1:52pm |
"move the wheel to the other side" = right-hand drive
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2005 Dodge Durango 4.7 V8
OLD Tow Vehicle 2004 Honda Odyssey
2015 RP179 "73b"
OLD 2005 Viking Saga 2480ST popup
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Mountainrev
Senior Member
Joined: 22 Jul 2014
Location: Eagle, Colorado
Online Status: Offline
Posts: 193
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Posted: 03 Dec 2014 at 1:56pm |
Wildfire: Looks like you and I have similar towing experiences. I used to have a Viking popup, and currently tow with an '04 Durango 4.7. Mine has 3.92 gears. What do you have?
In my limited time towing the Pod with the Durango (just picked up the Pod this fall, and towed it about 800 miles total), I've not been real impressed with the Durango transmission. It was great towing the popup, but I don't like the fact that you can't lock it in 4th gear. Tow/Haul only locks it out of 5th. In overdrive, it tends to hunt for gears, but in T/H, the RPMs shoot up a bit higher than I'd like on flat roads (above information not withstanding). It also runs hotter than I'd like in the mountains.
What's your experience?
Sorry about butting in on this thread, but hopefully it's related enough to the OP!
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2014 177
2008 Jeep Grand Cherokee Turbodiesel
"I lift my eyes to the hills."
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techntrek
Admin Group - pHp
Joined: 29 Jul 2009
Location: MD
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Posts: 9062
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Posted: 03 Dec 2014 at 6:50pm |
Ah, got it!
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wildfire305
Groupie
Joined: 22 Jul 2014
Location: Erlanger, KY
Online Status: Offline
Posts: 85
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Posted: 03 Dec 2014 at 6:58pm |
I just got it (the durango) a few days ago. Not sure on the rear differential. Is that on the door jamb tag? It doesn't even have the hitch on it yet. Early spring project for the hitch and all my wiring. I get to start over and get a different brake controller this time. The Odyssey transmission went the day after Thanksgiving and I bought the durango Saturday.
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2005 Dodge Durango 4.7 V8
OLD Tow Vehicle 2004 Honda Odyssey
2015 RP179 "73b"
OLD 2005 Viking Saga 2480ST popup
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