I Need Help From the Ford Guys!!!!! - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 12 (permalink) Old 04-09-2007, 03:24 PM Thread Starter
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Question I Need Help From the Ford Guys!!!!!

I have started several threads on the Dodge Forum with little or no credible replies. I am hoping that someone in this forum has a better understanding of Load Ratings, GVWR and Payload Capacities.

I have a 2008 F350 CrewCab 4x4 shortbed dually due to arrive in about 3 weeks. It is replacing a 2007 3500 MegaCab 4x4 dually (shortbed is the only way this truck is abailable) due to load capacity issues.

My questions are:

Since the MegaCab is built on the same frame, suspension, springs, shocks, axles, brakes and tires as the QuadCab longbox, with the only difference being that the MegaCab has a longer Cab and shortbox, wouldn't it stand to reason that the GVWR would be the same?

They are not!

The MegaCab is only a 10,500# GVWR and the QuadCab has a 12,200# GVWR. The payload capacity of the MegaCab is only 2,800#s (including occupants) while the QuadCab is rated at 4,900#s. The MegaCab axles are rated at 5,300#s for the front and 9,350#s for the rear, the same as the QuadCab that I looked at. Both are riding on E rated 10 ply tires.

I know that all of this is a mute point, since I will be trading the truck soon, but I just have to find an answer.
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post #2 of 12 (permalink) Old 04-09-2007, 04:55 PM
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I wouldnt have ever thought that but then again I havent taken a close look at the dodge's anyway.

There are probley several other people in the same position like yourself huh. :shrug:

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post #3 of 12 (permalink) Old 04-09-2007, 05:34 PM
 
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Two items:

Sometimes the manufacturers base the GVW rating on what they think the vehicle is going to be used for. The Mega Cab is a more upscale model, so may be considered more a personal use vehicle vs. commercial use.

Also, another consideration in GVW rating besides axles, suspension, and tires is frame strength. Dodge may be using a different frame in the mega cab reducing GVWR.

Just a couple of thoughts.
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post #4 of 12 (permalink) Old 04-10-2007, 12:36 AM
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Load capacity

The extra weight of the mega cab takes away from the available load carrying capacity. Just like the f350 single rear axle has a higher tow rating than the f359 dually.
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post #5 of 12 (permalink) Old 04-10-2007, 12:43 AM
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Just a wild guess, but I think the body on the MegaCab would not be as stiff & have more flex than the QuadCab thus making the GVWR less for the MegaCab. As far as I know the frame is the same.

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post #6 of 12 (permalink) Old 04-10-2007, 12:45 AM
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Quote:
Originally Posted by Bailey47
The extra weight of the mega cab takes away from the available load carrying capacity. Just like the f350 single rear axle has a higher tow rating than the f359 dually.

Duh forgot about the extra weight also !

~ Steve

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post #7 of 12 (permalink) Old 04-10-2007, 01:11 AM
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No pin weight in a Mega.
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post #8 of 12 (permalink) Old 04-10-2007, 01:21 AM Thread Starter
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Quote:
Originally Posted by Bailey47
The extra weight of the mega cab takes away from the available load carrying capacity. Just like the f350 single rear axle has a higher tow rating than the f359 dually.
I'm looking at the 2008 SuperDuty Payload chart and the F350 CrewCab 4x4 SRW Load Capacity is 3,670#s, the F350 CrewCab 4x4 DRW Load Capacity is 4,960#s. GVWR favors the DRW by 1,600#s and Conventional Towing favors the DRW by 2,500#s. 5th wheel towing is the same for both trucks with the 3.73 axle ratio.

I don't follow your logic that the SRW can tow more than the DRw.
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post #9 of 12 (permalink) Old 04-10-2007, 01:23 AM Thread Starter
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Quote:
Originally Posted by BROKER
No pin weight in a Mega.
What do you mean by "no Pin weight?
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post #10 of 12 (permalink) Old 04-10-2007, 01:32 AM Thread Starter
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Quote:
Originally Posted by Y_Knot
Just a wild guess, but I think the body on the MegaCab would not be as stiff & have more flex than the QuadCab thus making the GVWR less for the MegaCab. As far as I know the frame is the same.
Thanks for the reply. This is about as close as I have come to a logical answer to my question so far. I had also speculated that since the payload would be concentrated more to the rear of the MegaCab frame due to the long cab/short bed design, that it might hypothetically put more stress in this area than the frame was designed for on the QuadCab Longbed.
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