Grouper63

I have 2 and mine is 6400

Steel City 07

The actual HDPP (3.5 or 5.0 only) comes with a few additions over a 2.7PP or a Max Tow 3.5/5.0.

The HDPP is the easiest (and often only) route to get 3.73 gears with the 3.5 Ecoboost.

The HDPP mandates Max Tow, so all of those features are included. Trailer brake controller, rear receiver, bumper, 3/4-float 9.75 rear end, etc.

In addition to the Max Tow features, the HDPP ensures that the HDPP frame is installed in lieu of the LD or HD frames. The HDPP frame is the thickest and stiffest frame available.

The HDPP also installs the stiffest rate rear springs, which are not available in any other configuration, including Max Tow. They are 2+1 leaves similar to the lighter duty Max Tow (non-HDPP) springs, but are thicker and have higher stiffness/load capacity. HDPP always results in a RGAWR of 4800 lbs. Most non-HDPP models are rated to 4150 RGAWR or less, sometimes as low as 3400. (Certain Powerboost models are rated at 4350 due to the significant additional weight of the electric powertrain components, but the payload is still very low.)

The HDPP also mandates the use of one of the top two or three stiffness front springs, depending upon the cab/bed configuration. This also provides additional front end load support for the heavier frame, powertrain, etc. It also provides more FGAWR headroom for heavy front end accessories like grille guards, bumpers, plows, etc. The front end also usually bears a small amount of the bed weight as the 8-foot bed is centered forward of the rear axle. I believe it usually uprates FGAWR to 3750 lbs, but in the case of the regular cab it might be 3450. Diesel models might go a bit higher.

Finally, the HDPP provides the legal 7850 lbs GVWR that ensures that loading up to that amount is of minimal liability and a non-issue legally.

dbdev

Wow, thank you so much for that detailed explanation! Much appreciated!

dbdev

Much appreciated sir. You have me seriously rethinking my HDPP build. 1900 + is pretty darn good. It's got me wondering now if a Lariat SCREW 4x4, with the mid trim and max tow package could yield 1800 in payload. The price difference between an XLT mid w/HDPP and a Lariat configured as mentioned, is pretty slim. Thanks again!

blkZ28spt

Not a 14th gen, but my 2019 Lariat 501A SCREW 4x4 3.5 had 1,759 lbs of payload. If it had not had the tailgate step, it would have been close to 1800 but not quite IIRC. There was nothing else to take away for payload purposes though. And max tow adds a little weight/drops payload by a little bit too

So, for a full 1800, I'm guessing you won't get there with a crew cab Lariat 4x4 mid. But it might not be far off if you skip all the rest like no pano roof, no tailgate step, no FX4, no spray in bedliner (bedrug is lighter), etc

hidesert cowboy

how do you even select HDPP? all I see is max tow as an option. the base lariat is cheaper than the high XLT for what its worth. I tried to select 3:73 and it will only allow me to select 5.0 or 2.7

blkZ28spt

Try a 6.5 foot crew cab in XLT301A or lower, with 3.5 or 5.0

Lumberjackadam

HDPP is only available on XLT-mid or lower trim levels.

Steel City 07

In addition it is only available with the longbed (8’ bed) on Regular Cab and Supercab models. On Crew Cab you need the 6.5’ bed.

It cannot be bought with a short bed on Regular Cab and Supercab models and with the extra-short bed on Crew Cab models.

hidesert cowboy

so I finally found out how to get it. you have to select long bed extended cab, or long bed crew cab, it only comes on XLT and lower trims IMO these are trucks that are rarely specd anyways. the exception being the 6.5 bed crew cab XLT/