zx12-iowa

But aren't the brakes the same regardless of payload? So that makes no sense, unless they are different. Otherwise, other components are the same but for an added spring and different wheels/tires on max payload.... I think the sticker is a sham.

Wannafbody

I'm not sure what type of brake pad Ford uses, whether it's ceramic or semi metallic. It's possible Ford uses an upgraded pad on the HD models. I wonder if Ford lists more than 1 pad part number?

I agree about the sham part, when a XLT 5.0 has a 7350 GVWR and another XLT EB has a 7200 GVWR then you know something is screwy.

ragerjr

Zx12-iowa/Wannafbody, The brakes on the HD models are or at least tag as aheavy duty brakes.. If youlook at the Ford parts website it shows brakes for "base payload" and "Heavy Duty Payload". I have linked the website below. This is for MY 2010. It looks like the rotors are different but not sure about anything else.

http://www.fordparts.com/Commerce/Ca...o=F-150#Search

Wannafbody

Interesting, thanks

KR Kodi

iTrader: (1)

I don't know whether pads are any different or not, but it looks like there are different pads for different prices.

However, there are definitely different hubs for 4x2, 4x4, base, and HD trucks.

You can see in the link below for a 2013 F150, there are different parts for trucks with different features.

One difference is the size of the rotors - e.g., if you click on the different front rotors you can see there are 13.75" and 15" rotors. I don't know what truck uses the 15" ones - maybe the Raptor?

And, of course, the HD hubs have 7 lugs, so the rotor needs to have 7 holes.

http://www.fordparts.com/Commerce/Ca...o=F-150#Search
.

ragerjr

Okay I understand this is a little off topic but it is also related. I was looking at the new 2015 Ford RV and Towing guide. Per the towing guide (I will link it at the bottom) the Max towing for a XLT CC 4x4 157" wheelbase EB HD Max Tow is 11500/11400 (conventional/gooseneck/5thW). The GCWR is 17100 and GVWR 7850. If you cannot exceed the GVWR/GCWR when towing these #s cannot be true.
Here is the Math:
GCWR: 17100
GVWR: 7850
Max Towing (MT): 11500/11400
Tongue/Pin Weight: 1150(10%of 11500)/ 1710 (15% of 11400)
GCWR - MT = 5600/5700
5600/5700 is the MAX your truck can weigh to be able tow the max amount and be equal to GCWR. If the curb weight is 5200 (7850 -2650(came off of the build site for payload max) once you add the pin/tongue weight then you are over the GCWR by 1000lbs. You will not be over the payload but over GCWR. It also states in the fine print "cannot cause vehicle weight to exceed rear GAWR or GVWR". So which one one do you use, the lesser of the two, I would think.
IMHO these #s are from the lawyers to protect Ford and the other Auto manf. from being sued and I have nothing againist that. Please someone that is smarter then I am on this matter please correct me.

http://www.fleet.ford.com/resources/...Tgde_Sep30.pdf

http://bp3.ford.com/2015-Ford-F-150?...ng=en#/Models/

smokeywren

Trying to condense two pages and 12 columns into a short summary gets me confused. So let's use one specific truck and the applicable columns and rows that apply to that truck.


XLT CC 4x4 157" wheelbase EB HD Max Tow with 18" tires.
GCWR = 17,100
GVWR = 7,850
Tow rating = 11,500


GCWR minus tow rating = 5,600 pounds max weight of wet and loaded F-150 HD (not including hitch weight) when grossing 17,100. 5,600 pickup weight plus 1,150 hitch weight = 6750 GVW on the truck axles with the trailer tied on.


GVWR minus 10% of tow rating for the minimum tongue weight = 6,700 pounds max weight of the wet and loaded F-150 including passengers, hitch, full tank of gas, and all payload except the 1,150 pounds minimum tongue weight.


So once again, GVWR is the limiter, not GCWR.



You lost me there. If the curb weight is 5,200 and you add 1,150 tongue weight you are at 6350 GVW on the two truck axles. GCWR 17,100 minus 6350 is 10,750. Your tow rating (which is based on the GCWR) is 11,500, so you still have up to 750 pounds you can add for people, tools, options, etc. before you exceed the GCWR. So go back over that idea and explain it better to me.


You don't exceed any of Ford's weight limits, so whichever one is the most restrictive is the one you use as your limiter. For most F-150s, the GVWR is the limiter, so that's the first one I check. But rGAWR can be the limiter on some trucks, and GCWR on very few trucks. The receiver hitch may be the limiter on some trucks, especially if you intend to tow without a weight-distributing hitch.

ragerjr

With the 2015 F150 the GCWR is the limiting factor not the GVWR. Using your#s I will show you what I mean.

“XLT CC 4x4 157" wheelbase EB HD Max Tow with 18" tires.

GCWR = 17,100

GVWR = 7,850

Tow rating = 11,500”

GCWR (17100) - Tow Rating (11500) = 5600lbs (this is the max weight of thetruck if you want to stay within GCWR while pulling the Tow Rating of 11500lbs)

The Curb Weight of the "XLT CC 4x4 157" wheelbase EB HD Max Tow with18" tires" is 5200lbs (this # comes from the Ford Build Site by taking themax payload of 2650lbs from the GVWR of the truck which is 7850lbs). That only leaves you 400lbs left for people, tools, hitch, tongue weight, etc.to stay within the GCWR. You have notcome anywhere close to the GVWR yet. Taking the 10% rule for a bumper pull trailer at 11500lbs that equals1150lbs of tongue weight (TW) on the truck. Okay follow my math here:

5200(truck)+1150(TW) = 6350lbs (GVWR is 7850, have not exceeded the GVWR)

5200(truck)+1150(TW)+100(WDH Weight, this seems to be the common #)= 6450lbs(still not at GVWR still have 1400lbs for people and other items before you hitGVWR)

11500(TW) + 6450 (Truck/WDH/TW) = 17950 GCWR (without a driver or anythingelse in the truck). The truck is now over the GCWR by 850lbs. Never did we ever hit the GVWR of the truckin fact we still have 1400lbs to go. Ifyou put 4 people with an average of 200lbs a piece (200x4=800lbs) in the truck,we still have 600lbs left before the GVWR is met. With the people in the truck we are now1650lbs over the GCWR of the truck.

Does everything I stated above make sence? I will be happy to answer any other questions on my math and below I have listed the references
that I used to get my information.

Ref A: http://bp3.ford.com/2015-Ford-F-150?...ng=en#/Models/

Ref B: Ford's "2015 RV & Trailer Towing Guide" Pg10 "Maximum Cargo Weight with Slide-IN Camper" table line "4x4 SuperCrew", Columns "F150","GVWR" , and "Wheelbase".

Ref C: Ford's "2015 RV & Trailer Towing Guide" Pg16 "Trailer Towing Selector" "F150 Conventional Towing-Maximum Loaded Tralier Weight" table Column "Super Crew 4x4 157" WB" section "3.5lGTDI V6" "3.73" bottom line

brulaz

This ^^^^

I've got a high payload (>2000#), so over-load my rear axle before exceeding the GVWR (payload). I'm also very close to the hitch's rating of 1150# for wdh. That's with a 7500# trailer.

My guess is that the only time you will come close to GCWR or Tow Capacity is when pulling a loaded flatbed with 10% tongue weight. Doubt if those limits are ever relevant to Travel Trailers with higher tongue/pin weights.

brulaz

Again, this only applies with low, say 10%, tongue weights. It's can also be the case with earlier year trucks.

High side travel trailers should have a min of 12%, and I prefer even higher % to reduce sway.

Run your numbers with 13% tongue weight and see what happens.