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#4544278 - 10/15/17 05:35 PM F150 shuddering again at speed
buck91 Offline

Registered: 04/17/12
Posts: 2420
Loc: West Michigan
So my 2011 F150 is shuddering again during high speed braking. Worse as pedal application gets stronger. Absent regardless of braking force during non-highway driving. Like, totally smooth unless I'm going 65mph or greater and then its there even with light braking. NO pedal vibration noted at this point, its felt in the truck body mostly.

Wondering about rotors vs a death-wobble scenario. I am running a 2in level with very slightly over sized tires... but they wear even.
2011 F150 4x4 5.0L
1996 Mustang GT 5spd/ragtop

#4544302 - 10/15/17 06:11 PM Re: F150 shuddering again at speed [Re: buck91]
Zaedock Offline

Registered: 09/10/05
Posts: 3939
Loc: Massachusetts
I don't know if it's material or design, but I had the same issue on my '12. Only in the front though.

I had the same issue with pulsation, especially when towing my camper or ATV's/Jeep. The dealer replaced my rear axle seals and I had them replace my rear brakes with Motorcraft, but I installed Powerstop up front. I have had no issues at all now. The PS brakes are a bit more (not much more!) than factory, but the performance has been awesome. Break in for the Powerstops is critical. I conducted most of it early in the AM at my youngest's high school parking lot.
2016 KIA Optima SXL 2.0L Turbo/2012 F150 Ex-cab 5.0L
1992 YJ "The Heep"/2004 Malibu Maxx LT
1975 Ford Bronco/1959 Willys CJ5/20XX Custom rock crawler

#4544331 - 10/15/17 06:39 PM Re: F150 shuddering again at speed [Re: buck91]
HoosierJeeper Offline

Registered: 11/23/16
Posts: 1270
Loc: WI
Impossible to have death wobble on IFS, at least the normal Jeep definition of it. Sounds like rotors to me, had the same thing in my Liberty. Violently shook the wheel, don't remember much in the pedal, but it was really noticeable to passengers even.
15 Jeep KL Limited V6: Formula Shell 5W20
07 LR3 SE V8: Maxlife 5W30
05 Jeep KJ Limited: PHM 5W30
96 Jeep XJ Country: STP HM 5W30 (winter)

#4544350 - 10/15/17 07:06 PM Re: F150 shuddering again at speed [Re: HoosierJeeper]
JeepWJ19 Offline

Registered: 09/09/15
Posts: 899
Originally Posted By: HoosierJeeper
Impossible to have death wobble on IFS, at least the normal Jeep definition of it.

We don't talk about that word!

Definitely not death wobble if you don't have racing stripes in your underpants.

Agreed sounds like a rotor issue in my opinion
2002 Jeep WJ 4.0 | Mobil 1 HM 5w30 |
TG8A | 2.5" lift | 148k miles

Software Engineer :]

#4544370 - 10/15/17 07:33 PM Re: F150 shuddering again at speed [Re: buck91]
Brett776 Offline

Registered: 07/17/17
Posts: 25
Loc: Florida
As stated, death wobble applies to a solid front axle not IFS.

#4545339 - 10/16/17 05:16 PM Re: F150 shuddering again at speed [Re: buck91]
cjcride Offline

Registered: 11/06/09
Posts: 1789
Loc: Ontario Canada
Had similar symptoms about 35 years ago in a Dodge. Turned out to be rotors.