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Old 10-13-2011, 05:30 PM   #1
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Towing 7600# Airstream 28 footer with 4X4 EB Ford Van

Hi - Glad to have found these forums. I'm very excited to create a SMB to use as a tow vehicle. I'm enamored of the idea of having a tow vehicle with bath, room to stretch out on long trips, etc.

I wanted to check-in with others who have SMBB's for feedback on using a Quigley modified 4X4 E350 V10 (2012 model) to tow my 28' Airstream. It's 7,600 pounds with a 950 pound tongue weight. I have a weight distributing hitch and the van comes with the heavy duty tow, alternator, etc.

Any input/advice would be appreciated. I'd be coming from a RAM3500 Dually with the Diesel engine - you don't even notice the trailer behind the RAM.

Thanks
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Old 10-13-2011, 06:27 PM   #2
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Re: Towing 7600# Airstream 28 footer with 4X4 EB Ford Van

Check the gear ratio. 3.73 gears won't be good for that size trailer, and Quigley likes that ratio for some reason.

You may want to give QuadVan a call. They usually put in 4.30 gears. Plus, they drive and ride better.
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Old 10-13-2011, 06:43 PM   #3
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Re: Towing 7600# Airstream 28 footer with 4X4 EB Ford Van

Quote:
Originally Posted by carringb
Check the gear ratio. 3.73 gears won't be good for that size trailer, and Quigley likes that ratio for some reason.

You may want to give QuadVan a call. They usually put in 4.30 gears. Plus, they drive and ride better.

4.10 ratio from quigley. How about that?
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Old 10-14-2011, 10:25 PM   #4
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Re: Towing 7600# Airstream 28 footer with 4X4 EB Ford Van

Quote:
Originally Posted by travelguy2500
Quote:
Originally Posted by carringb
Check the gear ratio. 3.73 gears won't be good for that size trailer, and Quigley likes that ratio for some reason.

You may want to give QuadVan a call. They usually put in 4.30 gears. Plus, they drive and ride better.

4.10 ratio from quigley. How about that?
4.10 is better. It's good for an extra 3500 pounds of towing capacity.

But do a search on this forum for QuadVan reviews. There are several folks on here who have experience with both.
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Old 10-16-2011, 09:05 PM   #5
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Re: Towing 7600# Airstream 28 footer with 4X4 EB Ford Van

You did not mention your wheel diameter, but...
My EB V-10 QuadVan has 4.10's and 33" tires.
QuadVan does not go lower unless you want them to do it. If you change out your rear gears at QV you lose your factory warranty (on diff gears) and only have QV's one year warranty on the diff gears. Front diff gears also get the one year warranty.
Diff gears are only as good (long lasting) as the installer doing the job (not that QV does a bad job).

With that said I pull a 22' 5500 lb trailer.
If you have 33" tires I would recommend 4.56 gears. My van is geared too high w/33's & 4.10's.
If I had 35" tires with a V-10 I would want 4.88's.
4.10's put you below your torque spread most off the time. First will rev out way to long and 4th & 5th are not used enough. You need more than 2200 rpm at 70, especially pulling a trailer where you probably wont be going 70 (ie even less rpm's).
IMO the V-10 4x4 van (w/33's) needs 4.56 even without pulling a trailer. As its known the V-10 works better revving it out.
Remember when you get 4.10's from the factory they are designed to operate with the stock sized tires (not 33's or 35's).
I have had several 4x4's re-geared over the years. Correct gearing is paramount for proper acceleration, pulling power and economy.
Before they were re-geared they were dogs...

Oh, while pulling my trailer I get 6-7 mpg.
I would guess the Ram diesel is superior in every way at pulling compared to the Ford gas V-10.

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Old 10-16-2011, 09:38 PM   #6
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Re: Towing 7600# Airstream 28 footer with 4X4 EB Ford Van

Quigley put on LT245/70R17 Tires. I won't be doing any real off-road traveling for long distances. I just want the 4X4 for peace of mind going in/out of sometimes wet campsites (we tend to dry camp a lot with our Aistream camping groupd so often find ourselves in grassy fields or other, while not rocky or "rough terrain" surfaces that aren't usually prepped for vehicles. Plus this would be my backup 4X4 vehicle for bad winter weather; no trailer behind me; just driving around the area in weather than needs a 4X4
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Old 10-16-2011, 10:11 PM   #7
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Re: Towing 7600# Airstream 28 footer with 4X4 EB Ford Van

FWIW - I have 4.56 gears in may van which has 32" tires.
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