F150 payload quetion

Kevin O. wrote:

Buck50HD wrote:
Most of the standard 4x4 crew trucks are around 1500 lb, the max tows are 1800 while the HD payload are 2200+. I have not driven a max tow but the HD payload package is a huge jump in stability. It's not even comparable. Mine has 2171 on the sticker, crew 4x4 with HD payload and max tow.

Would you happen to know what the actual difference is between the max tow pkg and HD pkg besides the 7 lug wheels?? I was talking to someone on another website about this and he told me that he climbed under both trucks, got all the part #'s and insists that a Max tow Screw with a 6.5' bed has the same exact parts under it as the HD pkg except the 7 lug wheels. I find that very hard to believe once you see the difference in payload #'s. It has to either have bigger axles or stronger leaf springs or something?

The Screw with 6.5 bed has the thicker frame material as the HD Scab 8' bed. Also the HD has the 4800 RAWR, so if the part #'s are the same then the Screw Maxtow with 6.5 bed should have the 4800 RAWR. Doubt it does as the axles would be different to accommodate the 7 lug wheels. IIRC there are different bushings and what not as well on the HD.

Found this on the Ford site;
F-150 Heavy-Duty Payload Package
(Option Code 627)
Increases GVWR to 8,200 pounds.
– LT245/75R17E BSW A/T tires (5)
– High-capacity 17" 7-lug steel wheels (XL)
– High-capacity 17" 7-lug aluminum wheels
(XLT/Lariat)
– Heavy-duty shock absorbers
– Upgraded springs, radiator and auxiliary
transmission oil cooler
– 9.75" gear set with 3.73 limited slip axle
Available on XL and XLT Regular Cab and SuperCab
models with 8' box and XL, XLT and Lariat
SuperCrew with 6.5' box. Requires 5.0L V8 or 3.5L
V6 EcoBoost® gas engine and Trailer Tow Package.
Max Trailer Tow Package also required with 3.5L V6
EcoBoost® engine.