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 Post subject: GCWR?
PostPosted: March 27th, 2017, 4:46 pm 
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Joined: March 8th, 2017, 8:51 am
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I have a 1999 Chinook and I am trying to figure out my gross combined weight rating. This is not posted on the door so does anyone know this information or have any idea where I can obtain it?

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 Post subject: Re: GCWR?
PostPosted: March 27th, 2017, 4:54 pm 
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Joined: October 20th, 2015, 6:57 am
Posts: 576
Location: Northern NJ
It's in the back of the owner's manual. See the forum's Reference section if you don't have one.

Here's the 1998 version:

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Towing something? Tongue weight could be more important, due to how closely loaded to the rear limit that most Chinooks are.

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 Post subject: Re: GCWR?
PostPosted: March 27th, 2017, 8:12 pm 
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Joined: July 31st, 2014, 1:01 am
Posts: 1914
Location: 1999 Concourse
Agree with kdarling. My Concourse has an 18,000# GCWR and there is no way I could touch that without grossly overloading other (important) ratings.

For example:

- GAWR-Rear (gross axle weight rating, rear axle). My Chinook is relatively light, and even so my rear axle is pushing the rating when I'm towing a 4,600# trailer with 330# of tongue weight (for a gross combined weight of around 11,500# [oops, faulty math on this detail; make that a gross combined of around 14,500#] ). Reason is that when not towing, my rear axle is around 6,800# (or a bit more when fuel tank full). The 330# of tongue weight translates to an added 550# of weight on the rear axle. So there I'm at 7,350# on a 7,500# gross axle weight rating. Can't see how I could tow another 6,500# [make that close to 5,000# due to math correction above]!

- Hitch. I think the hitch is probably only set up for around 5,000#, but I can't remember if I "know" that or just think it. Maybe it's 6,000#. In any case, I can't imagine it hauling 8,000#, which is about what it would have to do to reach the GCWR.

So why does the 18,000# GCWR exist? Well my guess is that since Ford is the one who makes the rating, it exists because they are selling and rating a stripped chassis only. For all they know it's going to have a flatbed on it and nothing else. If that were the case it could maybe make that rating without crushing the other ratings.

It was the same situation on my previous camper van. No way to even come close to the "tow rating" without going ridiculously far over a few of the other ratings. But then Ford had no idea it would be a camper van or how heavy the conversion would be. For all they knew it would be an empty cargo van or super light conversion.

I do find that the Chinook tows beautifully (minus some rear-door annoyance); but I figure 5,000# is probably around the upper limit. Maybe not even that with a single axle trailer that runs a 10% tongue weight. A toad car four down has basically no tongue weight, but there is still the hitch to consider.

To know for sure on an individual rig, I like to visit the scale and get real numbers (for which Oregon is my favorite state, with Washington a close second - free and easy access to public scales!).

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Last edited by Blue~Go on March 29th, 2017, 8:55 pm, edited 1 time in total.

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 Post subject: Re: GCWR?
PostPosted: March 28th, 2017, 3:42 pm 
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Joined: October 20th, 2015, 6:57 am
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Location: Northern NJ
Thank you Blue, as always, for filling in some explanatory details and examples :)

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