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  #1  
Old 01-31-2018, 11:08 PM
lukester lukester is offline
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Default 2011 trailer weight question

The maximum trailer weight rating for my 2011 Supercab Sport V6 manual transmission is 3180 lbs according to the owner's guide. The trailer I want to tow approaches this figure.
The same truck with auto transmission is rated at 5640 lbs ! I've asked Ford service reps and an independent transmission service guy why there is such a big difference and they all shrug their shoulders. Is it just that the automatic is so much more robust?
Also, my hitch is marked 350 lb. maximum, which makes sense. Are the hitches with automatic trannys marked 560 lbs?

Any info/insight would be helpful and appreciated, thanks.
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  #2  
Old 02-01-2018, 09:14 AM
99Ranger376 99Ranger376 is offline
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Default Re: 2011 trailer weight question

The difference is because the clutch on a manual is the weak link, higher weight will cause it to wear quickly, due to excessive slippage. I assume you are talking about the hitch on the bumper, more weight then that will bend the bumper.


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Old 02-01-2018, 09:39 AM
lukester lukester is offline
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Default Re: 2011 trailer weight question

I wondered about the clutch being the weak link.
The hitch isn't on the bumper. The truck came with a factory tow package with a 2-inch square receiver. The 350 lb. is marked on that hitch.
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2011 ext cab sport, 4.0, manual trans, RWD

no mods other than aluminum mesh inserted in front of the rad and custom aluminum canopy
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  #4  
Old 02-01-2018, 10:55 AM
rwenzing rwenzing is online now
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Default Re: 2011 trailer weight question

Ford has several acceptance tests that must be passed by a fully loaded truck/trailer combination. One of those tests requires that the maxed combo be capable of starting from rest on a 20% test grade and then accelerate from there.

Automatics have a built-in advantage because the torque converter produces max torque multiplication when stalled. Under the right conditions, it can almost double the engine torque going into the transmission when the vehicle is traveling at zero MPH. This means that the automatic pulls away more easily from a dead stop under worst case loading and gradient conditions.

Manual trucks must slip the clutch in the first few critical feet from rest. Instead of multiplying torque like the automatic, the clutch throws away power in the form of heat.

So, all else being equal, a manual truck/trailer combo cannot pass the same hill test when loaded to the automatic's rated capacity. That's why the manual's tow rating is so much lower than the automatic.

The factory clutch is perfectly adequate for the truck. You could substitute a much larger clutch in the truck and still be faced with the same problem in that gradient test. The engine only produces so much power and part of that available power is wasted to heat during launch. It might improve very slightly but it's still not going to come close to the max rated towing capacity of an otherwise comparable automatic truck.
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  #5  
Old 02-01-2018, 08:10 PM
lukester lukester is offline
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Default Re: 2011 trailer weight question

Thanks rwenzing for the informative reply.
I now notice that the hitch label states that max. weight with a distributing weight hitch is 600 lbs. The travel trailer I want to tow weighs in at about 3400 lbs so with a wd hitch I should be OK and will avoid starting off on steep inclines.
I'll also look into upgrading to an auto transmission model !
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2011 ext cab sport, 4.0, manual trans, RWD

no mods other than aluminum mesh inserted in front of the rad and custom aluminum canopy
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  #6  
Old 02-01-2018, 09:14 PM
99Ranger376 99Ranger376 is offline
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Default Re: 2011 trailer weight question

Yes the weight listed on the hitch means the weight of the trailer tongue.


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2011 Ranger XLT 4x4 3.73 8.8" Trac-lok #1 T-bars, K -springs, LineX bedliner, General Grabber AT2's, Tonnopro tri-fold, CoverKing Realtree AP seat covers, OEM pre-keys, axle spacers, Bilstein 4600's, Hellwig AAL. Ziebart Undercoat
'98 Ranger XLT 2WD (sold)
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