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 > 260 hp?

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jaycocamper62301

Illinois

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Posted: 03/12/19 09:08am Link  |  Quote  |  Print  |  Notify Moderator

Looking at a 260 hp 5.9 Cummins in a super clean 2001 Expedition 34N that weighs 18400 dry. How much of a slug is this setup and will the transmission hold up to more power?

ferndaleflyer

everywhere

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Posted: 03/12/19 09:36am Link  |  Quote  |  Print  |  Notify Moderator

I wouldn't have a 5.9 in anything bigger than a pickup truck. Just don't hear good things about them

Two Jayhawks

Lenexa Kansas

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Posted: 03/12/19 09:51am Link  |  Quote  |  Print  |  Notify Moderator

Great engine. My 95 was very similar to the 2001 you are describing except mine was rated @ 230 HP. With a tow I was likely about 23,000 lbs. My current coach has 450 HP & w/tow is 45,000 lbs. Frankly my power to weight ratio is no different today than what I had 20+ years ago.


Bill & Kelli
2015 DSDP 4366 pulling a 2014 Ford Edge
2002 Safari Zanzibar 3906 gone
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jaycocamper62301

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Posted: 03/12/19 09:59am Link  |  Quote  |  Print  |  Notify Moderator

Two Jayhawks wrote:

Great engine. My 95 was very similar to the 2001 you are describing except mine was rated @ 230 HP. With a tow I was likely about 23,000 lbs. My current coach has 450 HP & w/tow is 45,000 lbs. Frankly my power to weight ratio is no different today than what I had 20+ years ago.


i have heard a 1% ratio is good before. We aren't going to be full timers and loading this thing up and max GVWR is 23000 so i'd be at a 1.13% ratio.

wolfe10

Texas

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Posted: 03/12/19 10:17am Link  |  Quote  |  Print  |  Notify Moderator

Transmission also makes a difference.

Is it the Allison 3000?


Brett Wolfe
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Ex: 1993 Foretravel U240


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discovery4us

California

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Posted: 03/12/19 02:47pm Link  |  Quote  |  Print  |  Notify Moderator

A 2001 Expedition is more than likely going to have a 5 speed Allison which will be the limiting factor. It will not be a powerhouse but it will get you there. May also want to look at the front suspension as some of the Expeditions in that era came with a leaf spring front suspension which rode rather harsh. Friends had one and towed a jeep no problems and would have kept it if it wasn't for the front suspension. They loved the floor plan.

Two Jayhawks

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Posted: 03/13/19 08:00am Link  |  Quote  |  Print  |  Notify Moderator

wolfe10 wrote:

Transmission also makes a difference.

Is it the Allison 3000?



Good catch Brett! My 95 Bounder had the Allison 6 speed.

ppine

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Posted: 03/13/19 08:36am Link  |  Quote  |  Print  |  Notify Moderator

5.9 Cummins with the Allison trans is one of the best combos ever made. You can bolt on some parts to add some hp, but you probably will not need to.

Your rig weighs 18,400 pounds. A full size pickup with a 7,000 pound trailer weighs around 14,000 pounds. Not that different, especially with the right gear ratios in the MH.

eheading

Lakeland, FL

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Posted: 03/14/19 02:47pm Link  |  Quote  |  Print  |  Notify Moderator

We have a 34' Newmar Ventana LE with the 340 HP 5.9 liter Cummins engine, and the 6 speed 2500 series Allison transmission. I love the combination. The transmission is the smoothest shifting of the 5 Allison's I have had, and I can climb hills as well as our 41' Revolution with the 400 hp 9 liter CAT engine. In my opinion, one reason it does well on hills is that it is governed at 2800 rpm instead of 2400.

Regading the 260 hp, we had a 36' Monaco back in the 90's with the 230 5.9 liter Cummins, and lived in it for over 2 years. We were very happy with the performance of that coach. The weight on that was about what you quote for the Expedition you are looking at.

Ed Headington

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Posted: 03/14/19 08:09pm Link  |  Quote  |  Print  |  Notify Moderator

I have a 99 275hp 5.9 ISB pushing approx 20,000 lbs (4,500 more when towing), does just fine. Have climbed many hills w toad (Mammoth Mtn, Death Valley, Silverton, etc). I wouldn't worry at all about the 260 hp version on a 18k lb coach.
BTW- I have the less desirable 4 speed MT643 trans, still performs fine.


Cliff

1999 Itasca 34V DP
2000 Jeep Wrangler
2014 Honda CRV


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