I wonder if it is a software bug, the truck is trying to do too much at startup. I would check in with your dealer and see if there are any updates to the software due to this. I also would start keeping notes on when it does it and what the circumstances are, the more info you give a mechanic the better otherwise they have to try and make it do it for them first. Intermittent problems are the worst as you never know if you fixed it or not and it is not realistic they are going to drive your truck as much as you do to find it. Flipside is that if they have seen it on someone else's truck they might know what to do or they may simply try a reprograming to see if it helps. Depends on your dealer.

 

@B52 ever get anywhere with this ?

 

I'm still having this issue about once a week. It hasn't been as violent as the first couple times but it still moves the truck when it happens. I won't take it into the dealer until it's repeatable. I had a FordPro rep reach out via PM here but they were requesting way too much PII. I'm not sure what a FordPro rep could do other than set up an appointment with my dealer on my behalf...which would not be helpful, at all.

 

This is still not repeatable enough in mine either so I still haven't wasted my trans tech's time. Interestingly, I had a Ranger lurch at start up today, no noise when it happened though. I'm sitting at 13k now, the Ranger was at 40k and this is not what he brought it in for

 

The lurch on startup was the automatic emergency brake. 🤷

 

If this is the emergency brake, then it's only for certain models that offer that option, correct?

 

Im assuming they all have the auto e-brake. I have an XL only

 

Update per Ford workshop manual. The transmission applies 3 clutches in park in anticipation of reverse or drive engagement. Each clutches creates a small positive drag to the driveline and could cause a slight rocking sensation of the vehicle at or just after the engine starts in park. This is a normal and desired behavior

 

So... Ford WANTS it to sound like you have a broken motor mount?

 

Thanks for the info. I would categorize this 'sensation' that I'm experiencing as moderate or severe. Therefore, I assume what I'm experiencing is not a 'normal and desired behavior' of the vehicle or that the bang/lurch that I'm experiencing is not related to what's described here in the WSM.

 

Yeah, no I doubt this is what the op is describing. Mine has done it twice in 80k miles, you think you just got rear ended at 70mph.
Mines a 24.

Edit… there is a tremendous bang and the whole truck jumps.

 

The deleting of the dipstick/fill tube assembly was not the result of a cost cutting revision.