Clunking sound on Gen 3 too

[GoldBeach]

Front driveshaft slop is making the most sense to me. I don't think it's the shocks, this is a mystery.

The dealership has told me that the play in the driveshaft is normal. I showed him a video of me grabbing the shaft and shaking it to make the same type of noise I hear going over small bumps. He said the service tech told him "If it didn't have that play in it then things would break." I countered with, while some play is surely normal, not to the extent that it makes noise over bumps. He didn't seem to agree.

I also had some transmission weirdness that included funky shifting and an abrupt thud/clunk when slowing down,. So while I was playing with FORscan to get rid of all the chimes, the double honk and change some lighting I cleared the transmission adaptive learning tables. It made a difference and it shifts better and more consistantly now.

However, playing with the transmission and still noticing a (non bump induced) thud/clunk in the low speed deceleration right before a stop I then tried putting it in neutral and coming to a stop the same way. Same clunk that felt like a hard downshift before. So would it make sense that if it is not the transmission, it could be an excessive play in the driveshaft issue? I can repeat the "feeling of a hard downshift" every time I slow down in neutral. Accelerate to 20mph and then slow down normally adding brake pressure as if I was coming to a stop and right at 10-8 mph it will feel like something under the truck gets hit with a sledge hammer, or maybe a slide hammer going forward.

Maybe not related. Still annoying.

 

[Jaketor]

Is there any way you could share the driveshaft shaking video with audio? If we could capture “that sound” it would go a long way to get all of us on the same page.

 

[GoldBeach]

Is there any way you could share the driveshaft shaking video with audio? If we could capture “that sound” it would go a long way to get all of us on the same page.

Watch a18ebk | Streamable

Watch this video on Streamable.

streamable.com

Here is best of what I can film. It's hard to hold the camera still while I'm under there, but you can move it slowly to feel the play, but it only makes noise with a bit of a quick movement. I can push where I do in this video or get my hand on the shaft and get the same thing it is just harder to get on camera without my arm in the way.

 

[Jaketor]

Watch a18ebk | Streamable

Watch this video on Streamable.

streamable.com

Here is best of what I can film. It's hard to hold the camera still while I'm under there, but you can move it slowly to feel the play, but it only makes noise with a bit of a quick movement. I can push where I do in this video or get my hand on the shaft and get the same thing it is just harder to get on camera without my arm in the way.

Great video!!! Yes that is THE NOISE! That's exactly what I hear when the truck is driving at lower speeds.

 

[2021White801a]

Taking my Gen-3 back on Tuesday for tech to take another stab at clunk over uneven ground at low speeds. The right rear shock was already replaced with no improvements whatsoever. I confirmed the replacement Fox shock was brand new, out of box. But guess the replacement shock could have been new too. Who knows. Next step per Hotline is to perform an active F150 TSB for clunk on accel at incline. (All reasonable repairs must be performed prior to field engineer coming out to inspect). Tech will throw on chassis ears to attempt to track this noise as well. I wish they could just take the front drive shaft off and road test. But doubt they will without directive from Hotline.

 

[aileron]

I tracked down one of the "clunk" sensations in my Gen3 today. On certain small bumps I would feel a very subtle clunk through the gas pedal.

Turns out the adjustable pedal has quite a bit of slop in the left-right direction. I was surprised to note that if I just grabbed it with my hand it wobbled quite a bit.

It doesn't look to be defective to me - just a little bit of sloppy design. There is no slop in the front-back axis (where the adjustment happens, and what you push again when you press on the pedal).

I suspect certain bumps - especially those at moderate speeds that create the right kind of high-frequency jolt in the truck - cause the pedal to wobble.

To "fix" it I adjusted the pedals closer to me, rolled up a section of microfiber towel and stuck it behind the gas pedal adjustment mechanism, then adjusted the pedals all the way back, thus compressing the microfiber between the adjustment mechanism and the firewall. This maintains enough pressure on the mechanism to keep it from wobbling.

Seems to help, try it out. This seems to eliminate the sensation I was getting through the pedal over small bumps and road imperfections.

 

[Shaheen J]

Taking my Gen-3 back on Tuesday for tech to take another stab at clunk over uneven ground at low speeds. The right rear shock was already replaced with no improvements whatsoever. I confirmed the replacement Fox shock was brand new, out of box. But guess the replacement shock could have been new too. Who knows. Next step per Hotline is to perform an active F150 TSB for clunk on accel at incline. (All reasonable repairs must be performed prior to field engineer coming out to inspect). Tech will throw on chassis ears to attempt to track this noise as well. I wish they could just take the front drive shaft off and road test. But doubt they will without directive from Hotline.

What dealer got the part for you? When did they order it? Mine is still on indefinite backorder.

 

[Ryan33]

Update for my issue. My dealership said that a replacement FOX shock (rear driver's side), will arrive at the dealership tomorrow to replace. We'll see if that helps. Wonder why some dealerships are advising customers that the FOX shocks are not available or on back order

 

[BellHeli407]

Update for my issue. My dealership said that a replacement FOX shock (rear driver's side), will arrive at the dealership tomorrow to replace. We'll see if that helps. Wonder why some dealerships are advising customers that the FOX shocks are not available or on back order

Mine is going in next Thursday for two new rear shocks they said they ordered them and no back order hopefully fixes are issues

 

[Shaheen J]

Mine is going in next Thursday for two new rear shocks they said they ordered them and no back order hopefully fixes are issues

I just got a call from my dealer too that my shock is in and its going in tomorrow. I think I was the first person to report the issue to Ford. At that time, they told me the part is on indefinite backorder and I should not expect it before Summer of 2022. Ford customer care also confirmed that they dont have an eta, but that it has been escalated as high as it can go. One of two things happened....we all put enough pressure on Ford and they decided to use production line parts for warranty repairs, or Fox caught up and provided more shocks to ford for warranty repairs. Whatever the case, Im glad we are getting access to parts for repair. Now let's hope they ship us functioning shocks and not the same deffective replacements.