Good morning! I would be glad to help you out with stuttering/vibration concern when loaded should you need further assistance. Just shoot us a PM with your VIN and dealer name/location, and I'll get right on it. To send a private message, just click on our username and select "Start Conversation". Thank you!I have this issue when loaded. No cap. Some posted about this in 2022. https://www.f150lightningforum.com/forum/threads/vibration-between-45-55-mph.13384/#post-286963
I have the issue but no cap. I have a sturdy Diamondback HD cover on the back that probably weighs in the neighbourhood of 140 lbs.It is interesting that it seems most (perhaps all?) of us that are experiencing this issue have a cap on the truck. I do believe this issue started after I put it on.
Hi there! Would you send us a private message with your VIN and dealership name and location? I’d like to look into this concern on my end.  I have this issue, no cap. I have posted previously, that it seems to be more noticeable when I have cargo/weight in the bed.
I thought it maybe tire balance, I recently purchased new tires. (Orignals wore out @30k, but that's another issue).
The vibration is still there but much less noticeable.
I DMed a Ford rep on this forum. Sent vin# etc.
They said they would work with my dealer. But I have not heard anything back in a few months.
Sorry to hear that you’re experiencing this issue with such a new truck. Do you also have a cap or any constant weight in the back?I've started noticing this as well , I'm in Canada 2024 Flash with less than 2500 KM on it (1500 miles).
I've only had it for 3 weeks not sure what to do. Seems better in sports mode , but at certain speeds it feels like I'm driving one of those cars with hydrolics that bounce on purpose.
Rest of the time smooth with no issues.
I have the tri-fold tonneau hard cover from Ford , almost no weight in the bed (some kitty litter LOL).Sorry to hear that you’re experiencing this issue with such a new truck. Do you also have a cap or any constant weight in the back?