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7.3 Powerstroke vs. Cummins

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Wardner
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Joined: 14 Dec 1999
Posts: 5376
Location: Tewksbury, MA 01876

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PostPosted: Sun Nov 25, 2007 6:04 pm    Post subject: Re: 7.3 Powerstroke vs. Cummins Reply to specific post Reply with quote

My '98 4x4 one-ton Dodge/Cummins developed the "death wobble". Just hitting an expansion joint on a bridge would set it off. New tires fixed the problem.
 
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Wardner
Tractor Guru


Joined: 14 Dec 1999
Posts: 5376
Location: Tewksbury, MA 01876

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PostPosted: Sun Nov 25, 2007 6:08 pm    Post subject: Re: 7.3 Powerstroke vs. Cummins Reply to specific post Reply with quote

My '98 4x4 one-ton Dodge/Cummins developed the "death wobble". Just hitting an expansion joint on a bridge would set it off. New front tires fixed the problem.
 
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JDemaris
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Joined: 01 Jun 2003
Posts: 13181


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PostPosted: Mon Nov 26, 2007 2:10 pm    Post subject: Re: 7.3 Powerstroke vs. Cummins Reply to specific post Reply with quote

I've got several heavy 3/4 ton, single wheel diesel trucks. All extended cab, all 4WD, all diesel, all long box. My 94 Ford with 7.3 turbo (not a Powerstroke) has been a great truck - but fuel mileage empty has never been good. E40D trans, and 4.10 axles. Gets a best of 14.5 empty.
My 85 with the 6.9 - 4.10 axles and C6 trans gets 11-12 empty.
My 92 Dodge with the 12 valve, turbo-intercooled 5.9 is much better on fuel empty, and a little better pulling a trailer. Has 3.50 axles and a Gertrag 5 speed manual. Gets a consistent 20 MPG empty. It has incredible low-end torque - much better than the Ford 7.3. Once it's in 5th OD, I rarely have to downshift. But, when the pedal is down a bit, and turbo boost comes up, they both pull about the same. Of course, the Ford should have an advantage with the 4.10 axles. If the Dodge did, I'd probably never use 1st gear.
The Ford rides much nicer than the Dodge, but the transmission is not very durable. It's been torn down around every 100K miles, sometimes less.
The Dodge rides like a 60s dump-truck when empty - - but is bullet proof and I trust it to do anything. The Dodge is my work truck, especially for trailer pulling. I pull a ball-hitch trailer with a couple of full cords of hard maple and red oak - and usually get 13 - 14 MPG on flat roads.
My Ford does the same and gets around 11 MPG.

I like them both - but the Ford is getting to be more of our vacation cruiser - or light trailer tower. It's got a gooseneck hitch and was worked hard it's first 200K miles - but that was before I had the Dodge.

I just came back from a 2000 mile trip through Michigan and Canada. Had a slide-on 1800 lb. camper on the back and was loaded with a lot of gear. We took the Dodge this time due to winter roads full of road salt. My Ford is a rust-free southern truck and I'm trying to keep it that way. So, the Dodge got 17 MPG for an overall average loaded this way. Considering the weight and wind resistance - I doubt anything will do much better. The Ford gets 14.5 MPG with the same load on the same trip.

If I had to trust my life to a truck - especially being worked hard - I'd have to pick the Dodge.
When I drive the Ford, I always find myself thinking about the next transmission failure - and it's been heavily beefed up already.

That all being said - I put 520,000 miles on my 87 3/4 ton Chevy with a 6.2 diesel, 3.73 axles, and a TH400 trans. It did a lot of trailer pulling - but never over 5000 lbs. Got 18-19 MPG empty, 13 MPG pulling a light trailer - but it lacked power for hill climbing. And, without the turbo really lost power at high elevations. My son has it now in Colorado - and driving at 5000 plus feet - mileage dropped 2-3 MPG until he put a turbo on it.
 
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