A Ford tech's take on "THE CLUNK" (THE ONE and ONLY CLUNK THREAD)

[11TUXSCREW]

Every now and then i get a clunk when shifting into drive or reverse is this when it happens for others?

 

[Pynenut]

I noticed this today right after starting up and accelerating on my 2012 Crew. I heard a clunk which seemed to come from the rear. Is there a TSB on this and should I take it in to the dealer?

 

[solarfuel]

Holy crap i had this happen to me for the first time ever while climbing up a dirt embankment in 4L with my locker on and i thought i broke something. Wow i feel better now. Thanks for the great sticky!

 

[Raptor9598]

Where is the best definition of this issue?

I have what I would call more of a "chirping" sound when slowing to a stop and then when taking off again.

I also have what I would call more of a clunk (inconsistently) that I've always associated with the transmission shifting gears.

2010 6.2L 30300+ miles.

 

[Madcowranch]

Where is the best definition of this issue?

I have what I would call more of a "chirping" sound when slowing to a stop and then when taking off again.

I also have what I would call more of a clunk (inconsistently) that I've always associated with the transmission shifting gears.

2010 6.2L 30300+ miles.

Yep. I got the chirp too.

 

[Pynenut]

I am just going to take mine to the dealer. 2-3 shift, nose from driveshaft, usually when cold. 9k on the odometer.

 

[Vicv]

Clunk Fix

Had them re grease the driveshaft yoke and that fixed the problem for a little bit, the sound came back. They eventually replaced my driveshaft and now the sound has been gone, going on 10,000 miles after the old one was replaced.

 

[Raptizzle]

Had them re grease the driveshaft yoke and that fixed the problem for a little bit, the sound came back.

Same here.

So they're telling me that the service bulliten shifted to 2011's now only. They're trying to attribute the issue to my added travel numbers. Wtf.... Replace the driveshaft now!!

 

[Conejoracer]

I have s 2010 6.2 built in April 2010 and has 44k on it. Mine has been clunking for a little while now and I have this sticker on mine.

Mine clunks on little bumps, potholes, etc.
I guess I'll try my luck with Ford first, then grease it myself if they blow me off.

 

[Conejoracer]

I decided to pull the shaft and lube the driveshaft slip yoke myself. The splines were drier than a bone. I lubed it up with a high quality lubricant and no more clunk for now.