Has anyone noticed a drivetrain noise when decelerating? I can be doing pretty much any speed and when I let off of the throttle and coast, I hear a rotational noise. I really don't know how to describe the noise but I can say for sure that I can get back in the throttle and it goes away. As soon as I let off the throttle, it makes the rotational "humming" noise.

Another noise that bugs the hell out of me is the clunking noise that I hear in some cases. I can be cruising along at low speeds and let off of the gas and I hear a clunking noise like it has slop in the drivetrain. I can also be coasting along at low speeds and give it throttle to speed up and hear the same noise like its taking up slack in the drivetrain before it takes off. I am an extremely picky guy about my vehicles so most would not have even noticed these noises especially with a little bit of radio volume and windows up. However, I like riding with the windows down and noticed these noises very early on but kept telling myself it was probably normal since it was a brand new truck.

Lastly, can anyone else take their output shaft coming out the rear of the transfer case and move it up and down enough to hear the clunk each time you do it?
Doesn't seem right to me, especially when my 98 K1500 with 220,000 miles has no slop like this. I may just be too picky but this type of drivetrain slop just doesn't seem normal to me for a 2016 with less than 8,000 miles on it.

 

Apologies if this seems like cap't obvious, but, check your front hubs and make sure they're on "Auto" and not "Lock". If they're locked that could explain the rotational noise.

I think the torque converter doesn't lock up until ~35MPH, that might be your low-speed "slack".

Can't help with the physical shaft slop issue.

 

I can't remember, but does your truck have the center support bearing for the drive shaft?

 

I haven't noticed any "rotational noise" as you've described, but I do, sometimes, hear the "clunk" noise when letting off the gas, not always though. I will check my rear output shaft tonight and let you know.

 

Just checked my drive line output from the transfer case, I have absolutely zero play, up/down, left/right, in/out or rotational. Very tight all around, my 2011 early build has about 84k miles on it and had very few issues (knock on wood)

 

My truck does not have the carrier bearing.

 

In order for me to feel the play in the output shaft, I have to have the truck on very level ground, to the point where the truck doesn't roll forward or backward which would take the slack out of the driveline and prevent me from feeling it.

I've been more worried about it since stopping at a local ford dealership and trying to replicate this play on like 15 trucks. Not a single truck had the slop, but of course most were not on level ground and I'm assuming none of them had the parking break engaged.....

 

I had a clunk in my 2015 starting at around 50,000 kms. It occurred mostly just as I was coming to a stop and then I would hear the clunk just once. Occasionally I would hear something on acceleration but mostly as I came to a stop. It was intermittent initially but became more frequent as the miles increased to about 96,000 kms. I mentioned it to the dealer multiple times but they couldn't find it. At my 96,000 km oil change they were finally able to replicate it on the hoist. They thought there were some loose bushings in the drive shaft so they removed it. Once removed and inspected they couldn't find any worn-out parts so they reinstalled the drives haft. Something must have been loose because the clunk has not occurred since the reinstall.

My 2015 is a CC long box dually.

Regards,

Lauren

 

For what it's worth I had a clunk when taking off from a stop and when decelerating at slow speeds on my 2016 F-350 long bed. Kind of resembled the slop in a trailer with surge brakes with the coupler moving forward and back.

I removed the 2ea bands on the rubber boot on the slip yoke, (if your careful they can be reused) and then removed the rear drive line from the transfer case and pulled off the slip yoke. I greased the outer splines on the drive shaft and also the splines inside the slip yoke. Installed the slip yoke in the same orientation it was removed from and the clunk has gone away.

Hope this helps.

 

With only 8k miles and this concern - have you taken it to the dealer? To verify something was normal or not, I've looked at a few trucks on the lot... In my case everything was fine, but this might not be your case. If it isn't (and it sounds like you have too much play) then Ford is going to fix it for you regardless. I know I would make Ford fix it. No sense in me messing with a new truck.