Tow Packages and Rear Axle

Cooter'sFX4

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Several XJs, a TJ, T-Bird, and an Expedition
I just want to share a little and see if anyone has more information.

I ran up against that warning sticker for how much the vehicle could tow:

4 Do not exceed a trailer weight of 7,000 lbs. (3,175 kg) or 36 sq. ft. (3.4 sq. m) trailer frontal area with only the Class IV hitch (53B), without the Trailer Tow Package (53A). -Trailer Towing Guide 2021 F150

I believe the warning is solely about brake controller, or is kind of boiler plate as they can't cover all options, but just saying get 53A insures the capability. Looking at the specifications online it seems a 5.0 can tow more than that (and the warning not found there). I opted for just 53B, and got the Integrated Brake Controller along with 3.73 E-Locker. Consulting this site before ordering I had trouble finding any mechanical differences between trailer towing packages that were not MAX Tow.

Just before ordering (literally, out in the dealer lot), I found a similarly equipped XL Truck. I believe there are three axles on these trucks: 8.8, 9-3/4 and 9-3/4 "3/4 Floater". All Max Tows clearly had a 9-3/4, I didn't quickly find a way to see the difference visually between a 3/4 Floater version or not. All "regular" (non Max Tows) F150s had the 8.8, but that one XL I found had opted for 3.73 E-locker and got a higher load rating along with a (believed regular) 9-3/4, so I went in and ordered!

Opinions? (Other than I should've got MAX Tow...)
 

Crapblaster

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2021 F150 King Ranch
My thoughts on this are there is the standard 8.8" for a lot of builds, the 9.75 for heavier/max tow builds and the the 3/4 floater for the HDPP builds. I found this ticker on my receiver hitch.

20210113_153759[1].jpg
 

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