so what makes an HD payload truck HD?
11-12-2014, 03:58 PM
#1
Senior Member
Thread Starter
so what makes an HD payload truck HD?
According to this thread https://www.f150forum.com/f38/grey-f...e-axle-274463/ the shafts are interchangeable between the regular and HD axles. Same bearings, just one less/more wheelstud. That says to me that the axle has nothing to do with the added payload and the difference is all in the suspension and tires. That being said it occurs to me that if I was to augment the suspension of my max-tow equipped truck and add LT tires that I could up the effective safe carrying capacity of my truck to match an HD payload equipped truck. Is my thinking off here? Is there something I'm overlooking? I realize that you can't change the number on the door, but my concern isn't that number, but a safe number. I do not believe that exceeding the number on the door is inherently unsafe as long as you address the weak links
11-12-2014, 04:33 PM
#3
I Like Tires
Not sure the actual axle difference but on the previous body style they used the 10.25 sterling axle with more splines etc. I couldn't figure out why they only used the 9.75 on this body style. Even more confusing the 2015 HD package has 6 lug wheels.
11-12-2014, 04:49 PM
#4
Senior Member
Thread Starter
All the 157" wheelbase trucks come with the upgraded frame so that's a moot point in my case
Last edited by king nothing; 11-12-2014 at 04:54 PM.
11-12-2014, 07:03 PM
#5
Member
The main limiting factor of the rear gross axle weight is the rims themselves. The stock 20" rims are rated the best of all the 6 lugs and they stop at 2025lbs a wheel. The 7 lug wheels are 2400lbs a piece and still the limiting factor of the HD packages.
So the LT tires wont help as much as the wheels. From my recollection the 6 bolt rear setup was limited to 4100lbs aside the wheels. Maybe in a wheel bearing or suspension component. Not sure.
Link won't let me copy on my phone but google 2013 F150 fleet spec pdf and the first link will explain lots. Page 13 for the wheels.
So the LT tires wont help as much as the wheels. From my recollection the 6 bolt rear setup was limited to 4100lbs aside the wheels. Maybe in a wheel bearing or suspension component. Not sure.
Link won't let me copy on my phone but google 2013 F150 fleet spec pdf and the first link will explain lots. Page 13 for the wheels.
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DirtDawg (11-14-2014)
11-12-2014, 08:29 PM
#7
Senior Member
I think all Screws have the thicker frame.
I am a bit suspicious that a 6 lug aluminum wheel has a 2025# rating and the 7 lug has a 2400# rating.
My guess is that the real difference is in the slightly stiff spring rates.
I am a bit suspicious that a 6 lug aluminum wheel has a 2025# rating and the 7 lug has a 2400# rating.
My guess is that the real difference is in the slightly stiff spring rates.
Last edited by Wannafbody; 11-12-2014 at 08:35 PM.
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11-12-2014, 09:47 PM
#8
Senior Member
Excerpted from sales brochure .....
Heavy-Duty Payload Package (Regular Cab and SuperCab with 8-ft. box; restrictions apply) increases GVWR to 8,200 lbs. for improved payload and towing; 17-in. 7-lug steel wheels; LT245/75R17E BSW all-terrain tires; heavy-duty shock absorbers; upgraded springs and radiator; auxiliary transmission oil cooler; rear axle with 9.75-in. gear set and 3.73 limited-slip gear ratio
11-12-2014, 10:19 PM
#9
Senior Member
The above chart lists an aluminum wheel as an option.
11-12-2014, 10:55 PM
#10
Senior Member
Mostly marketing. Like painting a bumper adding a sticker and saying your truck is now an "off road" or "fx4". But to be fair, the package doesn't cost a lot. So that tells you not much is upgraded...