Could the 2018/19 S550 5.0 “rattle” be....

[Jetnoise]

IMRC has been my thought for sometime.
The rattle is throttle induced.
From my experience it isn’t in the driveline.
Based on where the noise sound manifests itself it up higher on the firewall...where the IMRC would be. Maybe the rattle is just that the IMRC trying to find a good home for itself based on throttle input

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[Mazman]

I have the decel rattle on mine and I have the A10.
Can be heard while driving and in idle.

My manifold has been replaced as well as my engine....

 

[NIXPP2]

I will gladly unhook my imrc to see if it has any effect as long as I know it won't cause problems. I'm sure it would kick a cel, but anything else?

 

[GritzNGravy]

My 16 has the rattle really bad. I first started noticing it after around 500 miles on it. Starts at 2200 -3000rpm range, and does it on acceleration and deceleration, but worst on deceleration. I remember back in 16 coming onto this forums and searching for noisy lifters thinking the rattle was upper end noise. My rattle goes away 90% when warm and hardly notice it. When the 18 first got the rattles and had cylinder scoring I scoped my cylinders and found nothing wrong. All Blackstone labs oil analysis comes back perfect, well below averages.Compression good at 230 psi or more per cylinders. I do not have the tick. When cold on a rack the noise seems to come from the bellhousing/backing plate area, like by the plug in the backing plate on driver side was really loud there. I put a MGW shifter thinking that might help, seemed to get louder. BG fluid seemed to make it louder also. I went all in with a RXT, flywheel and calimer stg1 transmission from VMP hoping to end the rattle (also have a stg 2 Whipple in my garage for 3 months so getting it ready for that). Well my new transmission doesn't hold second gear at all, so I only put 15 miles on it and then had to put the old transmission back in, so I didn't have enough of a chance to listen for the rattle trying to get second to work. With the new clutch and flywheel and old transmission the rattle is the same. Also for the IMRC, it rattled with the original intake manifold and the gt350 which I currently have and with stock tune,pp3 tune and Lund tune as well. Im really started to thinks its the engine or maybe the backing plate theory.
At this point Ive stopped caring and just really want to get my Whipple on.

 

[Jetnoise]

I have the decel rattle on mine and I have the A10.
Can be heard while driving and in idle.

My manifold has been replaced as well as my engine....

That is not the rattle my car makes

 

[Jetnoise]

I will gladly unhook my imrc to see if it has any effect as long as I know it won't cause problems. I'm sure it would kick a cel, but anything else?

Without locking it in a stationary position I don't know if that will work.
I don't think it would hurt anything other than making the car feel lazier on the bottom end.

 

[Mazman]

That is how my lift off rattle sounds

The 2K is different and so is the typewriter...

That is not the rattle my car makes

 

[1bad66]

Mine is 100% throttle/load dependent. No amount of fooling with the shifter (6-spd) changes its tone or consistency. Sounds very much like a connecting rod rattle from my experience. Many early Toyota 4 cylinders would exhibit a very similar noise when the rod bearings would get a lot of miles on them. It's the same type of metallic, aluminum hollow type of rattle. The give-a-way for me is that the rotating assy (crank/rods, etc) must be in a 'coast' condition to produce the rattle. Soon as you tip-in the throttle you are removing the decel load and for a moment (or more if you modulate it) you are between a decel and accel load, better known as a 'coast' condition. If you tip-in a little more you are in an accel condition which again loads the rotating assy and the noise disappears.
Once you remove the load it allows the rod to 'float', where it's gonna make noise if it's outta spec. This includes connecting rod side clearance, connecting rod bearing clearance, wrist pin tolerance and even piston to wall clearance...All of which are prone to noise when coasting..Not decelerating, but coasting (no load).

 

[zackmd1]

So automatics are immune to the rattle?
Don’t think they are

I can confirm they are not since my 18 10 speed had the rattle. But the TSB listed is for the 10 speed automatic F150. The idea seems to be that Ford left to little clearance between the trans spacer and the flywheel/flexplate and in certian conditions there is contact creating a rattle.

 

[Jetnoise]

The give-a-way for me is that the rotating assy (crank/rods, etc) must be in a 'coast' condition to produce the rattle. Soon as you tip-in the throttle you are removing the decel load and for a moment (or more if you modulate it) you are between a decel and accel load, better known as a 'coast' condition. If you tip-in a little more you are in an accel condition which again loads the rotating assy and the noise disappears.

This does not describe my experience with the rattle

 

[Lo Pony]

That is how my lift off rattle sounds

The 2K is different and so is the typewriter...

That is exactly how mine sounds. I believe that is the injector pump or the imrcs.

 

[Cobra Jet]

Literally LMFAO.....

I usually hit up the GT350 forum on here, but haven’t in a bit... what do I see on the first few threads down on page 1!?!

THIS:
https://www.mustang6g.com/forums/threads/engine-transmission-plate-noise-fix.115718/

Seems like the GT350 crowd had THE rattle that I suggestively posted about here (without even knowing either sub-forum was discussing or trying to fix the same noise)....

So there ya go... the trans spacer plate can be the source of the rattle on the S550 - without any “official” doc from Ford (yet).

Cheers fellas!

 

[Issues]

Has anyone eles noticed when it's damp outside the rattle is much quieter? Today there was light rain and the rattle was almost non existent. This also was the case a few weeks ago when I took it out after it rained. Am I not hearing it because the air is more dense or is it because water is getting thrown up into the bell housing/transmission area and dampening the vibration.

 

[Tony Alonso]

Literally LMFAO.....

I usually hit up the GT350 forum on here, but haven’t in a bit... what do I see on the first few threads down on page 1!?!

THIS:
https://www.mustang6g.com/forums/threads/engine-transmission-plate-noise-fix.115718/

Seems like the GT350 crowd had THE rattle that I suggestively posted about here (without even knowing either sub-forum was discussing or trying to fix the same noise)....

So there ya go... the trans spacer plate can be the source of the rattle on the S550 - without any “official” doc from Ford (yet).

Cheers fellas!

I know it's a different transmission in the GT350 (Tremec) but I'd would love to see this plate on the MT-82 configuration. I also would love to get some recording of the rattle. Where's a good Ford NVH engineer when you need one?

 

[EVL-S550]

Had my one piece DS and FRP short shifter installed last week. Rattle is quieter. Strange...

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