Great Explanation of 6.7 Powerstroke Typewriter Noise

[Sludgemonkey44]

I’m terrible at this kind of stuff so bear with me, but I stumbled across this little video (it’s through facebook so not sure how that works for everyone) and it’s a great visual to go along with the explanation of why the 6.7 Powerstroke has the occasional “typewriter” noise and why it’s not only ok, but it’s actually designed into the engine itself.

8.8K reactions · 311 shares | The 6.7 Noise That Has Everyone Worried for Nothing That typewriter sound coming from your 6.7 is completely normal. Ford issued a TSB confirming the thrust washer noise on every 6.7 Powerstroke from 2011 to 2026 is by

The 6.7 Noise That Has Everyone Worried for Nothing That typewriter sound coming from your 6.7 is completely normal. Ford issued a TSB confirming the thrust washer noise on every 6.7 Powerstroke...

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[Vecman]

Great timing - I heard this the other day and thought, man, I hope this isn’t an issue. Whew!

 

[Apples]

Might not warrant it's own thread, but I just discovered the reason for a certain "audio effect" coming from my idling Gawdziller.

I had asked Google's AI to perhaps narrow the estimated timeframe of when Ford began to address the Godzilla engine idle oil pressure and roller lifter failures, etc.

I then asked it about a sound like a fan clutch when disengaged, and freewheeling when worn or prematurely worn out.

Here's what comes from the horse's mouth:

"The sound you are describing—a low-volume, faint metallic rattle at idle that mimics a disengaged mechanical fan clutch—is actually a known characteristic behavior of the 10R140 TorqShift 10-speed automatic transmission rather than the engine itself.

Commonly referred to by heavy-duty truck owners as "gear roll-over noise" or front pump chatter, it presents exactly as you described:

The Cause: When the engine is idling in Park or Neutral, the firing pulses of a large-displacement V8 cause minute, rapid variations in the crankshaft's rotational speed. This vibration transfers directly into the transmission's robust, heavy-duty gear sets and hydraulic pump gears. Because the transmission isn't under a driving load, the gears can lightly clatter against their backlash clearances.

Why it sounds like a fan clutch: The sound often resonates forward through the transmission bellhousing, making it trickier to pinpoint and causing it to sound like it's coming from the rear of the engine bay or the accessory drive.

As long as the noise is faint, consistent, and completely disappears the moment you shift into Drive or touch the throttle, it is entirely normal for Ford’s heavy-duty 10-speed platform."