Sup guys, i just bought my first ford ever it's a 2022 F150 XLT with the FX4 package. Great truck i love it. The only thing is when I got home with it I was sitting in my slopped driveway in drive with the brake on, when I let go of the brake the truck started rolling backwards. The Hill Assist was turned off, should it be on? I've had a Silverado 1500, Jeep Wrangler and a Ram 1500 before that and never had an automatic transmission roll back on me while in drive. Does it have anything to do with the off road package, hill assist? Or should I take it back have them look at it.

 

Turn your Hill Assist back on. You're describing the exact reason it was invented.

 

Wait, you said hill assist and FX4, I think the poster above is confused. Hill Descent Assist which is an FX4 option has nothing at all to do with what you described. What you described is remedied typically by Hill Start Assist, which is active by default and can't be turned off.

It's difficult to nail down your issue as I don't know your actual driveway situation, but in drive you typically should have enough engagement to not roll back much, but might slightly roll back if there is some slack in the driveline, which there almost always is with rear wheel drive and long vehicles like the F-150. The truck has sensors to detect the angle of the truck and the hill start assist may engage earlier in the RAM/Wrangler than it's programmed to in the F-150. In any of the vehicles it shouldn't matter if it's an automatic transmission or not. The hill start assist engages the E-brake to hold the vehicle and releases it when you hit the gas. If you park the F-150 on a slope and just put it in park and don't manually engage the E-brake, you may come back to find it is on.

So your truck will do hill start assist, Ford just may not have made it as sensitive as in the RAM/Wrangler you had.

Edit: Not sure why I didn't think of it, but if you don't already have it on, turn on Auto Hold. I think it slipped my mind because you mentioned rolling backward, but this will help in either scenario. It automatically holds the brake when you let off the brake and disengages it when you press the gas. It may have been on with your RAM/Wrangler, but seems to come off by default on F-150.

You can switch the system on or off by
accessing the menu in the SYNC display
screen.
1. Press Features on the touchscreen.
2. Press Driver Assistance.
Note: You can only switch the system on
after you close the driver door, and fasten
your seatbelt.

Once it's turned on, it stays on between drives. Just remember to turn it off for car washes! They get upset when your truck sits there thump thumping as the rollers struggle to move your vehicle.

 

Yes sorry that's what I meant Hill Descent Control. My driveway is a little steep but not to the point where I rolled back a foot or 2. I'll try again tomorrow and see if the truck will actually stop on it's own.

 

Also here is a link to the PDF version of the manual, it contains a lot of useful insights into Auto Hill Start Assist, Auto Hold, and many other features.

https://www.fordservicecontent.com/F...1_om_EN-US.pdf

 

Check back on my comment also, I edited to include info on Auto Hold. Which I think is what you are actually missing.

Hill Descent Control does not hold the vehicle. That is for when you are going down a steep hill and want to maintain a steady speed. You can tap the brake and it will hold the speed you were at when you tapped it.

 

Huge thanks for your answers really helpful and appreciate it!

 

I could understand you saying that if we were talking about a manual transmission, I've never owned any other vehicle from an 1982 Bronco to a 2016 Tacoma and everything in between where the vehicle rolled backwards in drive unless I was on something VERY steep. It's like the torque converter in the 10r80 is completely disengaged or something. By the way not everyone has hill assist genius.

 

How steep is the driveway? You should be able to get that info from the instrument cluster.

I have a driveway that is anywhere from 3 degrees, up to 5 degrees of slope, which would be up to a ~9% grade. My current PowerBoost has the torque to idle all the way up. I previously had a 2016 3.5, and that would idle slowly forward up the 6% grade, and while it wouldn't idle all the way up the drive, it would not roll backwards. I suppose a steep enough hill it would, though. I can't say how the other engines would do on a grade, as it is low end torque that matters here.

If your driveway is that steep, you can look at setting the auto parking brake in the camera screen, if you have the big screen in the truck. Not sure if it's an option with other trims... Not that auto parking brake would help you when you're in gear, but would stop the truck from rolling a couple of inches when you put it in park.

 

using the parking brake should address this issue