I am looking to purchase a 2022 F150 4x4 with a 3.5L EcoBoost V6 engine and 3.55 axle. SuperCab with 5.5 foot bed. Per Ford documents, the maximum loaded trailer weight is 13,900 pounds. The GVWR of my RV trailer is 7500. My question: With the configuration presented, will the F150 have any trouble pulling the load in mountainous terrain? Has anyone had any experience with this configuration while pulling a trailer up or down mountains?

 

I have a 2018 supercab (not Crewcab) 6.5ft bed 3.5 ecoboost 3.55 axle and Heavy tow package, which bumps towing capacity to 13,500 lbs and gives you a heavier rear sway bar and gives you a 36 gallon tank. I've been pulling a 34' 5th wheel around 10k lbs (I'll have to look at my sticker again, 8650 lbs pin wieght) for 2 yrs now. I have pulled it from Ohio to Florida thru Smoky Mts. Twice, 1st time bone stock (before tire and suspension upgrades). I didn't find a mt. highway I couldn't accelerate up. I am very pleased with the pulling power. I did put E rated tires on to almost eliminate wallowing I also added Roadmaster active suspension to gain some payload capacity w/o sacrificing empty ride quality too much. The E rated tires did effect my ride quality empty some too. But I didn't buy this truck to use as a car. BTW I was almost maxing out my Payload with my pin weight in stock form. The addition of the above tires and suspension upgrade eliminated all butt pucker on step fast downhills.

 

Can you tell me what the capacity shows on your door jam sticker- I was told we had the heavy duty tow package but then the door says gvwr is 7050- I have the bigger fuel tank and the 7pin break control- I feel like I may have been lied to?!?!

 

My truck sticker shows 7050 lbs. GVWR too. Front 3450 lbs., Rear 3800 lbs. So I would say that you have it. I'm pretty sure if you search around for a Vin # checker the code for that package is in the VIN #. I bet someone else on here could tell you.
There is a heavy payload package avalible too. A guy I work with has that package on a 2019 super cab 8 ft bed truck and his sticker says 7500 GVWR..
Rereading my earlier post I said 8650 lbs. pin weight. I meant 8650 lbs. (sticker actually says 8693 lbs.) camper weight. That is with the 2 propane tanks full. but w/o any of your cargo. Max GVWR is 9950 lbs. So i can carry 1257 lbs. of cargo including water. The pin weight on my 5th wheel is 1435 lbs. So even if I had all that weight on my 5th wheel pin it would be 2692 lbs. of weight in my bed. That is still well under my 3800 rear axle GVWR and I know a portion of that weight will be on the front axle too. I really could have been ok w/o the Roadmaster active suspension but it definitely helped eliminate with sway too.
I made another trip to Florida from Ohio and back a few months ago. I am still very pleased with this truck / 5th wheel camper package and how it pulls and handles the mountains. The camper I have is a 2015 Jayco Eagle HT 28.5 RSTS if anyone cares to check it out. I have a B&W turnover gooseneck hitch installed and use a Blue Ox 20K Super Ride 5th wheel hitch to connect to it. This isn't the cheapest setup to get but it leaves my bed totally clean when not setup to tow and it only takes me about 15-20 mins to install or remove the 5th wheel hitch.
I know this is a lot more info than you wanted. I hope it gives some good info to anyone considering towing a 5th wheel with their F150.

 

BTW the heavy tow package does bump up your towing capacity to I think 13,500 lbs up from 10,000+ lbs. w/o it.

 

I have no problems towing my 32' keystone cougar in the mountains. It has a dry weight of 9000lbs. And I've a 2016 f150 XLT Super crew 3.5L Ecoboost.

 

I'm pulling a 5th wheel around 9000lbs. With my 2018 3.5L. I have made 3 trips from Ohio to Florida and back thru the mountains. I haven't found an uphill I couldn't gain speed on. I will say changing my tires to E rated tires made a big difference on the stability especially going down hill in the mountains. I did the first trip with the stock D rated tires. The sidewalls flex a lot more making your butt pucker a lot more on those downhills.