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Old 05-16-2011, 04:20 PM   #1
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Trailer Tow Group Option

Hi

I am new to this forum and was looking for some help in purchasing a 2011 Jeep Wrangler Unlimited 4dr Sahara. Specifically, should I buy this vehicle with the Tow package? I've heard it hurts mileage and the ride is rougher. On the pro side I'm told it gives you a limited slip diferential for true 4 wheel drive, larger rad and a tranny cooler....
Any thoughts and thanks for the assistance....

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Old 05-16-2011, 05:18 PM   #2
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I don't think there is a bigger rad or tranny cooler included that is different than the non-tow equipped Jeeps. There is sway dampling included that is part of the stability control system that does seem to work. My 08 Sahara did come with a limited slip rear axle, but I don't recall if that came with the factory trailer package, or was a separate extra. It did ride rougher than my 2011 Rubicon, but that may have been partly from the shorter sidewalls on the tires. Or the 2011 rubicons have better shocks(?)

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Old 05-16-2011, 05:47 PM   #3
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Trailer Tow Group (AHT)
Trailer Tow Group: Hitch receiver, 4-Pin Wiring Connector, 3.73 axle ratio.
• Trailer Sway Damping (BNT)
• 3.73 Rear Axle Ratio (DME)
• Class II Receiver Hitch (XFN)
• Trailer Tow w/4-Pin Connector Wiring (XFU)


No heavy duty coolers or limites slip. limited slip is a stand alone option
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Old 05-16-2011, 05:49 PM   #4
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Old 05-16-2011, 07:43 PM   #5
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And just an fyi, a limited slip is nice, but it has nothing to do with "true" 4wd.
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Old 05-17-2011, 07:26 AM   #6
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Besides, the stock vehicle has the electronic brake lock diff feature. Bout the same functionality as the LSD once you learn how to use it (gotta rev it harder!) but not as good as a true diff lock.

The higher ratio diff is an advantage as the stock 3.21 gears are simply to low even for the stock tyres. Tow anything and you are hard pressed to stay in 6th gear. In fact in my reasonably stock 2 door I get better economy in 5th gear on the freeway than in 6th!

And secondly with the gearing if you ever want to change to even higher gearing in the future then the 3.73's are a blessing in disguise, as the 3.21's need the carrier changed as well where as the 3.73's already have a carrier suitable for going to 3.88, 4.10 etc.
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Old 05-17-2011, 07:34 AM   #7
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With a regear the above comment only applies to the dana 30 front axle where the carrier changes at 3.73. On the 44 rear axle the carrier changes above 3.92. The good news is that there are gears made to go numerically higher if you have the 3.92 and below r and p for the 44.
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Old 05-17-2011, 10:02 AM   #8
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Using this logic, anything less than 44 boggers ain't a mudder...right?

Quote:
Originally Posted by MTH View Post
And just an fyi, a limited slip is nice, but it has nothing to do with "true" 4wd.
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Old 05-17-2011, 12:23 PM   #9
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My 2011 JKU Sahara did not come with the tow package, but did come with the 3.73 gears, I would not want the lower gears if you are going to pull anything. It is much cheaper to buy an aftermarket receiver and 4 pin connector than to buy the factory tow package.
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Old 05-17-2011, 12:43 PM   #10
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I don't have my (2010 JKU) owners manual in front of me at the moment, but recall reading in there that the towing limit was 1000 lb (100 lb tongue wt) without the 'tow package', and 3500 lb (350 lb tongue wt) with the 'tow package'. No indication why the big difference in capability, if it's because of the gearing, the trailer-sway control, or something else. Can anyone confirm this, or shed some light on the issue?
-Sky
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Old 05-17-2011, 12:49 PM   #11
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Quote:
Originally Posted by gyroplane View Post
I don't have my (2010 JKU) owners manual in front of me at the moment, but recall reading in there that the towing limit was 1000 lb (100 lb tongue wt) without the 'tow package', and 3500 lb (350 lb tongue wt) with the 'tow package'. No indication why the big difference in capability, if it's because of the gearing, the trailer-sway control, or something else. Can anyone confirm this, or shed some light on the issue?
-Sky
are you sure thats not a 2 door vs a 4 door towing capacity?
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Old 05-17-2011, 01:03 PM   #12
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are you sure thats not a 2 door vs a 4 door towing capacity?
No I'm not sure. That would certainly make more sense. Struck me as odd when I read it, but maybe I misunderstood. Wish I had my book handy.
-Sky
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Old 05-17-2011, 01:23 PM   #13
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Ok. I went and dug it up. Anything with the 3.21 axle (which it appears is only available with the manual transmission) is limited to 1000 lb towing capacity.

All others are 2000 lb in the 2-door, and 3500 lb in the 4-door.
Still curious why the difference.

Couldn't you just drop it down a gear or 2 to get the gearing ratio back in the manual? Or is there a strength issue with the 3.21 which would make it prone to failure?

Excerpt from the owners manual attached.
-Sky
Attached Files
File Type: pdf 2011 Wrangler Towing Weights.pdf (668.8 KB, 94 views)
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Old 05-17-2011, 01:33 PM   #14
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Quote:
Originally Posted by gyroplane View Post

All others are 2000 lb in the 2-door, and 3500 lb in the 4-door.
Still curious why the difference.


-Sky
2doors have shorter wheelbase and not stable enough to tow 3500# so I've been told.
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Old 05-17-2011, 01:37 PM   #15
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According to my 2011 User's Guide the specs for the two models with 3.73 or 4.10 gears is:

Two-door: Max gross trailer wt 2,000 lbs. Max trailer tongue wt 200 lbs
Four-door: Max gross trailer wt 3,500 lbs. Max trailer tongue wt 350 lbs

With 3.21 gears they are both at 1,000 lbs and 100 lbs respectively
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Old 05-17-2011, 01:37 PM   #16
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Originally Posted by Pat@FieldsJeep View Post
Trailer Tow Group (AHT)
Trailer Tow Group: Hitch receiver, 4-Pin Wiring Connector, 3.73 axle ratio.
• Trailer Sway Damping (BNT)
• 3.73 Rear Axle Ratio (DME)
• Class II Receiver Hitch (XFN)
• Trailer Tow w/4-Pin Connector Wiring (XFU)


No heavy duty coolers or limites slip. limited slip is a stand alone option
If you have an automatic does it still come with 3.73 with tow pkg, or does it go up to the 4.10's like the Rubi? My auto 2door already came with 3.73's and no tow pkg.
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Old 05-17-2011, 01:40 PM   #17
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Quote:
Originally Posted by gyroplane View Post
Ok.
All others are 2000 lb in the 2-door, and 3500 lb in the 4-door.
Still curious why the difference.
-Sky
The difference has to do with the different wheelbase of the two Jeeps.
The 2-door and the 4-door have the same drive train, and will pull the same load. However, the shorter wheelbase of the 2-door makes it much more "twitchy" and hard to control if you get into any trouble. The 4-door's longer wheelbase is easier for drivers not experienced with pulling a trailer. It's a liability mitigation thing for the company, not a lack of capability for either wheelbase.
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Old 05-17-2011, 03:05 PM   #18
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Quote:
Originally Posted by Riledwino View Post
The difference has to do with the different wheelbase of the two Jeeps.
The 2-door and the 4-door have the same drive train, and will pull the same load. However, the shorter wheelbase of the 2-door makes it much more "twitchy" and hard to control if you get into any trouble. The 4-door's longer wheelbase is easier for drivers not experienced with pulling a trailer. It's a liability mitigation thing for the company, not a lack of capability for either wheelbase.
Yeah, sorry, I guess that was worded poorly on my part. That part I get. The part I don't understand is why the 3.21 axle is limited to 1000 lbs.
-Sky
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Old 05-17-2011, 04:25 PM   #19
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The engine won't have the down low power with a 3.21 gearing, Even in first, it'll take a lot more to get it to roll, truly, anything higher geared than a 3.73 isn't set up for towing. It's a highway cruising gear. Although, tire size does play a factor into it as well.
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Old 05-17-2011, 06:25 PM   #20
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Quote:
Originally Posted by desertgoose View Post
If you have an automatic does it still come with 3.73 with tow pkg, or does it go up to the 4.10's like the Rubi? My auto 2door already came with 3.73's and no tow pkg.
The 3.73 comes as a stand alone option or as part of the trailer tow group. It does not go to 4.10 like the Rubi.

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