Vibration between 50 & 70 mph

[keltymd]

I didn't pick up any. It I bet if you don't square everything and you have the vibration you would notice more nvh

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[speedfrk]

Seems "Ford Service" has removed themselves from the thread...

You would also think that Ford's Engineering Team would have identified crucial or problematic parts or assembly issues by now - after all, the 3rd model year is out and the issues are still persistent.

So why isn't Ford Service giving any updates as to what Ford is doing about the situation?

Maybe all of the online complaints (not just here) is swaying potential buyers from even considering an S550 - because there's complaints logged everywhere about this driveline vibe - just google "S550 vibration", "Mustang 2015 vibration", "Mustang 2016 vibration", "Mustang S550 driveline vibe", etc... yep, that explains why S550 sales have dropped off significantly...

You have Dealers who don't care to do warranty work, you have Techs and Service Managers that won't take the time to test drive properly or listen to the actual Customer who in some instances KNOWS MORE than they do, because the Customer researched the issue... you have Ford who knew of the issue since day 1 where it's documented in the "Faster Horse" documentary about the S550 redesign...

Ford doesn't want to take responsibility even when they know of the issue - just keep selling and who cares.... so I guess they're willing to eat all of the Lemons.

I think they are trying to avoid a TSB or recall. I have a love/hate relationship with this car but anyone who asks me about it I try to sway them away from buying one. It's not worth the risk. It will stay that way until Ford comes up with a fix (maybe the 2018's are fixed) and gets my car right because it's not just the car, it's the attitude. I drove my friends new Corvette today and it is fast, no vibration, and if I could get it in my driveway, that is what I'd be looking at. Camaro is just too ugly. But, I'm also looking at a Dodge Truck- reg cab, sport, 3.92 axle. It might scratch my muscle car itch and be a practical bike hauler so I can get down to 1 vehicle.

 

[speedfrk]

Is there any added or enhanced road noise with the Steeda sub brace?

No, that is the nice thing- and they do make a noticeable difference in handling. But they aren't a miracle if other stuff is wrong. They did help my car.

 

[keltymd]

so as an update on mine. Ford is buying it back due to engine issues so I am in the process of returning it all to stock. I took the IRS Braces off and took it for a ride, mildly spirited, and it started vibrating again.

This tells me the braces are keeping the IRS in line after I had centered it and without them it can flop around and cause the vibration.

 

[Lo Pony]

Ok fellas - my driveline vibration is G-O-N-E (for the 3rd time - isn't the saying something like, "3rd time is a charm"?)... it better be gone for good this time, because it's been a BITCH since approx 1,900 miles and 11 mos of my "new car" ownership (have just over 15k on it now).

The only sensations I can feel at this point are natural engine harmonics and road surface deviations (or tire "noise" over these same deviations).

Attached you will find THE MOST COMPREHENSIVE work order I have received to date on exactly what was performed AND it includes, specifics of actions taken and NVH readings from the MTS 4000 Analyzer tool.

PLEASE READ the work order in its entirety!!! Feel free to share it with your Service Center.

Also to note - I find it interesting as to what was documented about how one part of the test involving the MTS 4000 had to be worked around for use on the S550 (bottom of page 3 into top of page 4). This is making me wonder if other Ford Service Centers are actually using the tool 100% for all areas of testing or dismissing the use of the tool and just "saying" they used it to push the Customers back off of a lengthy warranty job.

The BIGGEST push a Customer needs to do is - go on a lengthy road test with an EXPERIENCED Shop Foreman or Tech. Explain the car HAS TO maintain the speed ranges noted where the issue is the worst and persists for a distance, not just hopping out on the road and driving around a corner and back. Be PERSISTENT with your quest to getting the desired results.

Enjoy!

Good going! That is the proper way to troubleshoot/diagnose and remedy the driveline vibration.

 

[Lo Pony]

Ok.. shit is getting weird, seriously. So I indexted the DS without moving the clamp and it got 5x worse lol. Took off the clamp and just as bad. Put the clamp back but moved it to the larger welded on weight..... BOOM. Smooth as glass again.
This is really mind boggling. How can the DS go out of balance once I had it balanced? Then be ok by moving the weight / clamp. Unless it's true about an inside piece of cardboard that comes loose.
Not really cool with self balancing the DS every 1000 miles or so... smh.

Speedfrk is absolutely right - you have to think of the whole rotating assembly - Shaft and pinion range. Shaft runout and flange runout are inherent to mfg. process. Imbalance of factory shaft is there intentionally to "precisely" offset vibration caused by runout, the idea being that everything lines up and runout and imbalance cancel and the result is smooth. You will NOT solve this problem with a "balanced" driveshaft. You have to field balance on the car by adding rotating weight under the flange bolts and test drive till you get it right.

 

[Lo Pony]

that is how I fixed mine. I squared the entire IRS Cradle with the front K-Member. When I verified that it no longer vibrated I installed the Steeda IRS Subframe Support Brace and that locked it all in place. No vibrations any more

That makes sense. I've been saying since page 50 or so of this thread that there had to be some "soft part" to blame for many of these cars that had the vibration suddenly appear after a few thousand miles. It especially makes sense if you have a decel vibe, where it's only apparent under float or deceleration conditions. That is usually indicative of pinion angle. Glad you tried this adjustment and it worked for you. Seems like it helped other cars too.

I've visited two dealers and neither have been inclined to do anything about it. Galpin Ford in the San Fernando valley acknowledged it, but said they didn't want to fix it. Ford of Orange in Anaheim said they couldn't feel it. No sense in arguing with idiots - no time for that. I'm deciding what to do next.

 

[abuch91]

So I initially reported that I didn't have this vibration, however last night I was trying to pay extra attention and noticed it. Theres like a 5mph window where it happens and it's so minor had I not seen this thread I wouldn't have noticed.

Coming from a Mazdaspeed 3 with full max durometer motor mounts it really is nothing...Are there any adverse effects that will be caused by this vibration? Or is it just simply a nuisance? I can live it it, but I don't want anything to be damaged by it.

 

[markw24]

Depending on where it is. I have seen a balance issue bad enough to at some point damage an in or out put seal. Then cause them to start leaking. Or worse cause a bearing failure.

 

[speedfrk]

So I initially reported that I didn't have this vibration, however last night I was trying to pay extra attention and noticed it. Theres like a 5mph window where it happens and it's so minor had I not seen this thread I wouldn't have noticed.

Coming from a Mazdaspeed 3 with full max durometer motor mounts it really is nothing...Are there any adverse effects that will be caused by this vibration? Or is it just simply a nuisance? I can live it it, but I don't want anything to be damaged by it.

Vibration wears stuff out but I wouldn't mess around with your car if it is that minor. Just don't drive it in the range where it vibrates any more than necessary. My car is worst at 60-70. Here in ATL, if you drive less than 70, you will get run over by a truck anyways, so I just avoid that speed range. Sucks that you have to drive a new car like that to make up for Ford's screw up and poor service but it is what it is. I get my revenge by telling people who ask me about the car to buy a different brand.

 

[gmansr]

When building the fox body car into dirt cars I had a spec sheet with all chassis and body measurements and specs. I am unable to locate one for the S550. Does anyone have these.?

ford factory shop manual under body repair example attached

 

[maddawg57]

I am happy to say that my 2015 Comp Orange gt with pp has not vibrations or rattles at any speed with 16,500 k on it so far .

 

[markw24]

ford factory shop manual under body repair example attached

Thanks

 

[Unadilla248]

Hi guys new to the forum Im Neal from Eastern Pennsylvannia, My 16 GT PP has the vibration, I recently installed the Steeda Subframe Alignment Bushings and Subframe Braces but did not change vibration my next step is to try feild balancing driveshaft.

 

[Dominant1]

Mine never vibrated with stock shaft but did with aftermarket going tomorrow to get it flipped 180 degrees will report back!

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