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Old 08-31-2011, 12:10 PM   #31
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Originally Posted by daggo66 View Post
It's not a HP thing. The 3.7 in the Liberty is 210 HP.

yeah, and mine struggles to pull a 2800lb camper. Don't believe the 5000lb hype on a Libby. Going to regear at some point to 4.10's and see if that helps at all considering I am lifted and running 245/75/16 tires.

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Old 10-24-2011, 02:28 PM   #32
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I've always been told that the towing limit is set by how much the vehicle in question can stop safely.


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Old 10-24-2011, 02:45 PM   #33
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I've always been told that the towing limit is set by how much the vehicle in question can stop safely.

That's why they put brakes on trailers.
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Old 10-24-2011, 03:16 PM   #34
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The whole thing HAS to be because of how the hitch is mounted to the frame. And IMO, the numbers are flat out wrong.

Go look up the numbers for a 2011/12 Grand Cherokee.
t
he engine (3.6), tranny (5spd auto), axle (3.09) and tire size (30.52) somehow allows it to pull 5000 pounds.

Yes...the SAME engine, SAME tranny, even shorter (numerically that is vs the 3.21) axle ratio and with tire size that that is larger than the pure Sport, but smaller than the Sport S/Sahara/Rubi.
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Old 10-24-2011, 04:01 PM   #35
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The whole thing HAS to be because of how the hitch is mounted to the frame. And IMO, the numbers are flat out wrong.

Go look up the numbers for a 2011/12 Grand Cherokee.
t
he engine (3.6), tranny (5spd auto), axle (3.09) and tire size (30.52) somehow allows it to pull 5000 pounds.

Yes...the SAME engine, SAME tranny, even shorter (numerically that is vs the 3.21) axle ratio and with tire size that that is larger than the pure Sport, but smaller than the Sport S/Sahara/Rubi.
That's been my feeling ever since I first saw this mentioned in another thread. I think the wheelbase of the JK has something to do with it as well since the JKU has a higher tow rating than the JK even though the hardware is the same.
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Old 10-25-2011, 02:10 PM   #36
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That's why they put brakes on trailers.

Wow....Thanks oilwell1415, I would have never thought of that.
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Old 02-21-2012, 01:59 PM   #37
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It's not all about the hitch, in fact it's mostly about the rear axle gear ratio. Simply put the higher the ratio the better but that does not mean that just because you have a high ratio you can tow more than the rating. To tow up to 3500 with a 4dr 4wd version you need at least the 3.7 rear axle ratio.
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Old 03-31-2012, 07:57 AM   #38
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http://www.automobilemag.com/feature...t/viewall.html

Found this link. We're all off the mark. Apparently, applying a tow rating is a fairly involved process. Being I work for a manufacturer, I figured there had to be more than just obvious numbers of the vehicle.

Anyway, thank you everyone for your responses.
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Old 03-31-2012, 08:18 AM   #39
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Quote:
Originally Posted by Jeepstin
http://www.automobilemag.com/feature...t/viewall.html

Found this link. We're all off the mark. Apparently, applying a tow rating is a fairly involved process. Being I work for a manufacturer, I figured there had to be more than just obvious numbers of the vehicle.

Anyway, thank you everyone for your responses.
Link not working
So did they raise the limit?
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Old 04-02-2012, 04:47 PM   #40
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No. The link just shows how the manufacturers apply tow ratings. There was a lot of exchanges (most inaccurate) so I thought I would share what I have found.
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Old 09-11-2012, 07:32 PM   #41
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I bought a 2012 as well and thought I would shed some light on the subject. A. a 373 and 4.10 gearing has more teeth and less likely to damage the rear end. Liberty has 3.73 gears and can pull 5k, with that said I have not seen issues with a dana 44 and 3.21 blowing up towing. I lifted mine off the ground to check and surely my unlimited automatic has 3.21 gears. I told the dealer I was towing about 3600 lbs ( my pop-up empty is 2800) and they had no issue with it since I have a trailer brake. I think when they wrote these specs they were thinking that most jeep owners lift and put on 35's or 37's and most people do not buy trailer brake controllers! Making sharp turn and braking can send the jeep out of control, after all they only weight 4100 lbs, your rear tires have 3500 lbs pushing the read end in the other direction of your turn. I owned a Ram 1500 and had a few times towing a boat and needed to avoid some driver on the road, that 7k lbs helped. by the way the hitch mount and bar was the same as my old 07 GC (thickness and weld spots) and it's mounted to the frame, I checked. This is not an issue. I don't blame jeep for the light rating, all the parts are there for 5000 lbs but the quick steering and how light they are would make for some big lawsuits if they said 5,000 lbs and the driver doesn't know how to tow. Maybe I am way off base but I only pull a few times a year and if they go I have a warrenty after all the automatic with the 3.21 gears is NOT rated! (Not too many owners would check the gears by twisting the drive shaft.)
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Old 09-11-2012, 08:57 PM   #42
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Originally Posted by Jeepstin View Post
Tow Ratings Finally Pass the Sniff Test - The Society of Automotive Engineers (SAE) - Automobile Magazine

Found this link. We're all off the mark. Apparently, applying a tow rating is a fairly involved process. Being I work for a manufacturer, I figured there had to be more than just obvious numbers of the vehicle.

Anyway, thank you everyone for your responses.
Since, (according to the article) powertrain cooling capacity and handling charicteristics during cornering and breaking are strongly influential to a vehicles towing performance, I can't believe they allow any 07-11 JK with an automatic transmission to tow anything.

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