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Old 11-15-2013, 02:43 PM   #21
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Why wouldn't they? Trust me, I know little about trucks- not even enough to be dangerous.

But, if the engine has to work harder to carry more weight- why wouldn't an upgraded alternator and transmission cooler allow the engine to handle the weight better (running cooler + having the more power it needs to consume or, at least, recover better while it does).

Again, the whole "weakest link" thing.
Carrying 200 extra pounds ON the truck is infinitely less work for the engine than pulling an 8000 camper behind it- which the 7200GVWR truck is rated to do. You could make the point that without the extra cooling you wouldn't need to pull a travel trailer at the max AND haul the extra 500 in the truck- but that requirement should be addressed by lowering the GCVWR. Alternator obviously just charges the battery, so that wouldn't affect payload. I am almost certain the upgraded alternator with max tow is a myth as it isn't listed anywhere and I've never seen it mentioned anywhere else.
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Old 11-15-2013, 02:53 PM   #22
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I am almost certain the upgraded alternator with max tow is a myth as it isn't listed anywhere and I've never seen it mentioned anywhere else.
So, doesn't that give credence to you don't completely know what the changes are with the max. tow package?

However, couldn't the larger alternator have to do with the extra demands of a larger trailer that requires brakes and therefore has a battery? (Again, remember my ignorance of how this stuff works.)
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Old 11-15-2013, 02:59 PM   #23
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I think the answer is "Good point. Doesn't make any sense. I don't know." Some will also likely say "Doesn't matter. It is what it is and if you wanna be legal you better follow it." (I've never liked someone declaring something IS without a reason.) But I'd like to know if anyone can come to any other conclusion regarding this:

2013 Ford F150 with tow package gives a GVWR of 7200#. Add the max trailer tow package and GVWR goes to 7700#. There is NOTHING on the truck that affects payload capacity. You get tow mirrors and brake controller for sure, but both are easily optioned to the truck and have nothing to do with payload. There are some that claim slightly better trans cooler and slightly different steering ratio. Also I believe that the gear ratio goes to 3.73, which is already the case on many trucks, specifically the FX4's. None of these things has anything to do with payload. It is perfectly clear that GVWR is NOT anything determined from an engineering standpoint. Same axles, same springs and shocks, same brakes, same frame. As far as I am concerned it is a marketing and liability issue. Has little to do with the safety or capability, otherwise you couldn't just slap some mirrors on a truck (TBC comes in many other packages) and raise the GVWR by 500 lbs.

For clarification: Some people confuse the max trailer tow with the max payload. Two different animals- max payload has a different axle, springs, wheels, tires, etc.

What say you?
With MAX HAUL and MAX TRAILERING the max towing weight is 11,200# I have one and I love it. Beats anything else I have ever had.

All come with a standard tow package. Do not confuse MAX TOW with it. Max Haul does give you beefyer springs and axles as mentioned. Mine is a 2013. Try it you would not believe the towing power and lack of overheating in both the engine and transmission. You would expect that with three radiators and you get it.

Jack
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Old 11-15-2013, 03:07 PM   #24
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I have one thing to say. Compare the 2 physical trucks, side by side, and then see what may be different on the 2. Then again, look at what I posted about magic towing dust.
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Old 11-15-2013, 03:18 PM   #25
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So, doesn't that give credence to you don't completely know what the changes are with the max. tow package?

However, couldn't the larger alternator have to do with the extra demands of a larger trailer that requires brakes and therefore has a battery? (Again, remember my ignorance of how this stuff works.)
The alternator has no idea what trailer is behind it, it merely charges the battery(s).
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Old 11-15-2013, 03:24 PM   #26
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The alternator has no idea what trailer is behind it, it merely charges the battery(s).
Understood. But, does the fact that you now have 12v going back to an extra battery mean that having a bigger alternator could keep up better with charging 2 batteries instead of 1?
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Old 11-15-2013, 03:28 PM   #27
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Understood. But, does the fact that you now have 12v going back to an extra battery mean that having a bigger alternator could keep up better with charging 2 batteries instead of 1?
That's all it does, doesn't take long to recharge the truck & trailer batteries. The bigger alternator just does it faster. The old generators did the same, it just took them longer.
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Old 11-15-2013, 03:38 PM   #28
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Bigger alternator provides more amps/hour .. and how does it do that, by taking more power from the engine (meaning it probably has bigger coils/shaft to turn, bigger magnets, thus more friction and more power required through the belt to turn it) . There goes some of the power which could be used to haul weight ... Either on the truck or being towed. Miniscule maybe, yes, but it does change the equation ...And it is also probably a lbs or two heavier than the regular alternator ?
Rolling your window down saps more power than the bigger alternator. The power draw of a larger alternator is miniscule.
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Old 11-15-2013, 03:47 PM   #29
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That's all it does, doesn't take long to recharge the truck & trailer batteries. The bigger alternator just does it faster. The old generators did the same, it just took them longer.
Ok, so the theory is there that they picked a bigger alternator to be part of this "max tow package" in order to more quickly recharge batteries assuming that with the higher towing capacity means a trailer with brakes and therefore a battery. (Holy run on sentence, Batman!)

Anyway- pure guessing on my part, of course. It's remotely possible that they increased the payload capacity due to that. Continues to give credence to both sides of the fence - that the concept is the "weakest link". But also to the "exceed your ratings" side in that, it's hard to believe that the stock alternator can only supply enough power to the single battery in the truck.

(Shrugs)
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Old 11-15-2013, 04:02 PM   #30
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I have one thing to say. Compare the 2 physical trucks, side by side, and then see what may be different on the 2. Then again, look at what I posted about magic towing dust.
Or maybe magic ANTI-towing dust where they downgrade the ratings. There is evidence this happens from models sold here and overseas. I have read several accounts of them being compared side by side and the only differences noted were those of the different hitch and tow mirrors, with the IBC being standard. I looked at many window stickers recently- many with regular tow, max tow and max payload. No structural differences that would indicate increased payload with max tow. Structural differences noted on max payload.
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