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Old 03-17-2014, 07:04 AM   #15
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The blocks may be going back in just to give the truck the rake back which would help with towing. Just have to get new u bolts as I don't want to reuse a thing like that.

The transfer case is a Borg Warner 4406 with torque on demand. It only transfers power to the front when the rear slips. I don't know much about it but I know people have had good luck with it in racing applications where they are supercharging these trucks and even using nitrous without having to modify the transfer case.

The truck came with the 7 pin, 3.73's a 10000lb hitch.

We do travel pretty light and don't plan on hauling water. We also can use another vehicle for my wife and kids and luggage if needed to keep the weights down.

I do have a fair bit of experience towing. We don't plan on winning any races with this setup and know we need space to stop. My work truck is a 2011 F550 that I tow a large trailer for my telehandler. So I am used to towing heavy weights. Way different application. But I've been towing since I got my license.

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Old 03-17-2014, 03:32 PM   #16
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If I was to venture a guess on why the rating is low it is because of the rims and tires that comes on the Harley additions. The rear end is still a 9.75" as used in the rest of the F150's. The transmission is the same 4R75W that comes in the rest of the older F150s that were rated with higher towing. Since you verified the springs are the same part number as the other springs in heaver applications you know that is not the case.

With your transfer case operation the AWD will engage on acceleration at pretty much all times. The module will duty cycle the clutch in the transfer case to transmit power to the front as a slip prevention measures. The harder you press on the fun pedal the higher the duty cycle for the front. This is why it is very important to have all 4 tires match within 1/2" of circumference of each other.

What has not been mentioned though if your truck had the supercharger added onto it. I forgot who added the supercharger to them but there are a few of them out there. It was part of a factory program. They came with only a 3/36 warranty instead of the 5/60.

Im not advocating towing above the legal weight limits but just pointing out a few things.

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Old 03-17-2014, 09:47 PM   #17
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No supercharger. Had the option when we ordered it. They wanted $10k more. And they were only doing the 2wd trucks. Though a lot of people added the same kit afterwards to the awd models.

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