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-   -   Overland reduced load capacity label (http://www.jeepgarage.org/f73/overland-reduced-load-capacity-label-17164.html)

vitk 01-07-2011 04:24 PM

Overland reduced load capacity label
 
i've got Overland with Adventure II package about a month ago. now i looked at load capacity label and noticed that it read that maximum load cpacity is 1050 lbs. In all specifications it listed 1650 lbs. I understand it could be reduced by about 100 lbs for package addition, but where another 500 could go. Just wondering if anybody else have similar number

GlowingGhoul 01-07-2011 07:30 PM

Re: Overland reduced load capacity label
 
If you got the HEMI, that's where it went.

Cherodude 01-07-2011 08:28 PM

Re: Overland reduced load capacity label
 
My Pentastar V6 OL with QL and ORG II also has the same figure on the B-pillar label: Max. combined weight of passengers and cargo 1050 lb.

Build date Nov. 19/10.

mjw930 01-07-2011 10:30 PM

Re: Overland reduced load capacity label
 
What's it say for the total GVWR? The base vehicle should weigh 4850 and 6500 is the GVWR. 6500 - 4850 = 1650

Cherodude 01-07-2011 11:29 PM

Re: Overland reduced load capacity label
 
Quote:

Originally Posted by mjw930 (Post 330321)
What's it say for the total GVWR? The base vehicle should weigh 4850 and 6500 is the GVWR. 6500 - 4850 = 1650

The 1050 lb limit for combined weight of passengers and cargo are on the label for the tire pressures. No GVWR limit is stated on that label.

So what are we to believe? The tires are limited to 1050 lbs total, but the rest of the suspension can take 1650? Not a very clear situation.

mjw930 01-08-2011 09:14 AM

Re: Overland reduced load capacity label
 
Look for the VIN sticker, it will have your GVWR.

http://www.wk2jeeps.com/engine/WK_ce...tion_label.jpg

It should be 6800 lb for the V8, 6500 for the V6. Figure the vehicle weighs in at ~5000 lbs and subtract that from the GVWR printed on the VIN sticker and that's your effective payload capacity if you aren't towing.

The stock tires on the Overland have a load rating of 107 which equates to 2149 lbs per tire x 4 = 8596. None of the 18" tires on Tirerack have a lower rating, in fact most are 109 or higher. Now, that doesn't mean you can load it down to 8596 lbs, just that your tires could handle it so the tires aren't the culprit.

To figure out how they calculated the number you are seeing involves some math. It's confusing but not that complex.

First, you always work from the highest number or the Gross Combined Weight Rating (GCWR) which is different than the GVWR as it includes any trailer you might have connected. From the owners manual, page 449 you get the following numbers:

3.6L 4X2 8900 lbs Trailer = 5000 lbs
3.6L 4X4 8900 lbs Trailer = 5000 lbs
5.7L 4X2 13100 lbs Trailer = 7400 lbs
5.7L 4X4 13100 lbs Trailer = 7200 lbs

Now, you work backwards by subtracting the trailer weight.

3.6L 4X2 8900 lbs Trailer = 5000 lbs (8900 - 5000 = 3900)
3.6L 4X4 8900 lbs Trailer = 5000 lbs (8900 - 5000 = 3900)
5.7L 4X2 13100 lbs Trailer = 7400 lbs (13100 - 7400 = 5700)
5.7L 4X4 13100 lbs Trailer = 7200 lbs (13100 - 7200 = 5900)

Now, looking at these numbers it becomes immediately obvious that there's no way you can ever tow the max trailer rating in a V6. Honestly, based on the literature I would have expected the numbers to me more like:

3.6L 4X2 11500 lbs Trailer = 5000 lbs (6500 + 5000)
3.6L 4X4 11500 lbs Trailer = 4810 lbs (4x4 is 190 lbs heavier)
5.7L 4X2 13460 lbs Trailer = 7400 lbs (6800 + 7400)
5.7L 4X4 13460 lbs Trailer = 7150 lbs (4x4 is 250 lbs heavier)

That leads me to believe the significant reduction in GCWR on the V6 is due to the transmission, not the suspension or frame. It also leads me to believe they used averages since the base Laredo is lighter then either the Limited or Overland, mostly due to the pano roof. Anyway, back to the calculations on the V8.

So, still working backwards we have 5900 lbs available after we hook up the largest trailer. Subtract the base vehicle weight and you get the max payload capacity.

5900 - 4850 = 1050 lbs

Now you know how they arrived at the number on the placard. So, if you aren't towing the actual payload capacity of the vehicle is the GVWR minus the base curb weight.

6800 - 4850 = 1950 lbs.

Oh, one more thing to remember. If you are towing you must add the tongue weight to the payload to ensure you don't overload the vehicle. In theory that would mean the payload available after you loaded the trailer would only be 330 lbs (1050 - 720). In practice you rarely load to the max trailer weight so a drop in 1000 lbs will actually give you back the tongue weight plus 280 payload.

The math lesson is done for the day but there will be a test later :tongueout:

JEEPSRT 01-08-2011 09:41 PM

Re: Overland reduced load capacity label
 
Nice post!

vitk 01-10-2011 01:33 AM

Re: Overland reduced load capacity label
 
thta's great math. but trailer weight should not be assumed on load capacity label. It is ont based on GVWR not on GCWR. I have presented this question to Crysler customer support, now they're escalating it to some engineering group.

mjw930 01-10-2011 07:57 AM

Re: Overland reduced load capacity label
 
Quote:

Originally Posted by vitk (Post 331487)
thta's great math. but trailer weight should not be assumed on load capacity label. It is ont based on GVWR not on GCWR. I have presented this question to Crysler customer support, now they're escalating it to some engineering group.

I don't think so, GCWR is the basis for all calculations on vehicles with tow ratings. On vehicles without a tow rating GCWR = GVWR. It will be interesting to see what Chrysler reports back. Let us know.

Regardless, if you aren't towing then your load capacity is simply the difference between your GVWR and what the curb weight of the vehicle is. Your tires have plenty of capacity regardless.

Did you find the VIN sticker to see your 6800 lb GVWR?

Bmwister 01-10-2011 09:30 AM

Re: Overland reduced load capacity label
 
Nice work, mjw930. +1rep

vitk 01-10-2011 01:01 PM

Re: Overland reduced load capacity label
 
it is V6 so VIN sticker is listing 6500.
Don't know if Chrysler approached that differently but on all other vehicles i'd seen load capacity was weight vehicle can carry without any towing additions and trailer tongue weight had to be subtracted.

vitk 01-25-2011 02:13 PM

Re: Overland reduced load capacity label
 
After several week going back and forth and weighting my overland on certified scales finally got an answer from Chrysler on the matter. Just summary of that
1. number on load capacity label is for heaviest Grand Cherokee vehicle with all possible options installed.
2. They admitted mistake on CGWR of 8900 and assured that docs will be updated with correct number of 10400.

My v6 Overland with Adventure II weight with about 3/4 tank was 4980 lbs, adding about 40lbs for 1/4 tank of gas it'll make curb weight 5020 lbs. Making it to have 1480~1500 lbs load capacity


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