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Old 01-25-2005, 07:08 AM   #1
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OK! I need help in deciding which axel to go with in the F350, PSD, CC, DRW, 4X4. This truck with a 4.1 axel has a GCWR of 23500 lbs and with the 4.3 axel has a GCWR of 26000 lbs (with one person).

The trailers I am looking at are 15000 to 17000 lbs. A F350 loaded with everything from what I read is around 7000-8000 lbs. The 4.1 axel is rated for a maximum 5th Wheel of 15600 and the 4.3 axel is rated 18300. If I go with the 4.3 axel instead of the 4.3 axel is it going to kill the MGP really bad when not towing.

I will be using the truck for towing about 5 months out of the year it will be our primary vehicle when not towing. Can I get by with the 4.1 axel pulling 16000-16500 lbs without it hurting the drive train? I could always go with a lighter trailer but the quality built ones seem to be the heaviest. Does anyone have these axels and what advice can you give me. I don't want to get the 4.3 and wind up getting 8-9 mpg not towing. Thanks!
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Old 01-25-2005, 07:08 AM   #2
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OK! I need help in deciding which axel to go with in the F350, PSD, CC, DRW, 4X4. This truck with a 4.1 axel has a GCWR of 23500 lbs and with the 4.3 axel has a GCWR of 26000 lbs (with one person).

The trailers I am looking at are 15000 to 17000 lbs. A F350 loaded with everything from what I read is around 7000-8000 lbs. The 4.1 axel is rated for a maximum 5th Wheel of 15600 and the 4.3 axel is rated 18300. If I go with the 4.3 axel instead of the 4.3 axel is it going to kill the MGP really bad when not towing.

I will be using the truck for towing about 5 months out of the year it will be our primary vehicle when not towing. Can I get by with the 4.1 axel pulling 16000-16500 lbs without it hurting the drive train? I could always go with a lighter trailer but the quality built ones seem to be the heaviest. Does anyone have these axels and what advice can you give me. I don't want to get the 4.3 and wind up getting 8-9 mpg not towing. Thanks!
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Old 01-25-2005, 05:35 PM   #3
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This was originally posted in the Motorhome - Towing section, but I am moving it to Trailer Towing & Vehicles where it will likely get more and better responses.

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Old 01-26-2005, 08:02 AM   #4
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Go with the 4.3. You will not regret it and your mileage will not be that big of a difference. If yo do alot of real city sto & go driving you get 1 mpg less than with 4.1 but on the highway the 4.3 will pull much better and handle the weight much easier. It will also seem to have more pickup than the 4.1 IMO

Go to the dealer, and test drive 2 trucks equiped the same except for the different ratios of rear ends. Yo will feel the differnce.
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Old 01-26-2005, 04:23 PM   #5
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You should consider an inexpensive car for your commutor. I have a real problem driving a $40K truck as a daily driver when I can use a $2K car I don't have worry about getting banged up & wore out when it's not doing what it's made for.
JMHO
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Old 01-27-2005, 04:10 PM   #6
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The biggest problem driving your $40K commuter is that the body will wear out before the engine does!
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who commutes 8 miles to work.
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Old 01-30-2005, 03:17 PM   #7
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Go with the 4.30 rear with the Tow Boss package. If you spend five months a year towing, I would think that you'd want to make sure it was best for towing. The only difference in the trucks will be a small difference in mileage, but I can't imagine it can add up to that much.
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Old 02-23-2005, 04:26 PM   #8
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Is a 4.33 avail now in an F350? Last I looked, that was a F450 unit.

Also if you're concerned about mileage very much, then drop the 4WD and use 2WD models
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Old 02-24-2005, 09:16 AM   #9
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The 4.30 axle is now available on the F350 with dual rear wheels. Ford calls it the Tow Boss.

I think you need the Tow Boss to tow that big of a trailer. You won't be able to get an F350 DRW near 7000 pounds. A crew cab dually is about 8000 pounds.
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Old 03-01-2005, 10:09 AM   #10
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Thanks Mark, shows you how often I shop for vehicles I guess.

Hey though, the Certificate of Origin, that I got with my truck showed a wt of 6860 lbs, which is what I sent TX to register it.
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Old 03-04-2005, 06:16 AM   #11
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I need to make this very same decision. When I found the F-350 with Tow Boss allowed 26,000 GCWR that elimitated the need for the F-450 with 4.88s.

My question is what is the "comfortable" cruise speed of a 4.30? The truck I have now has the 4.10 and 75 MPH is 2700 RPM, which is a lot with the diesel, and that's with 35-inch tires. Will I be able to tow at 70-75 at a reasonable RPM?

Thanks.
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Old 03-04-2005, 06:31 AM   #12
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The difference between 4.30 and 4.10 is 4.9%. So if you had the same tires and a 4.30 where you were at 2700 RPM before you will now be at 2832 RPM.
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