Strange Vibration

PepeTheMuleMN · **Posted:** Thu Apr 04, 2013 9:00 pm

Hello all, I have been quietly enjoying my new "used" 08' Liberty, its been great but now I am starting to question it. At around 18-20 MPH I get this small in and out vibration, I hear and feel it, and then again sometimes between 35-40mph. It does not happen at all times in these ranges but enough to worry me, it sounds almost like those road side strips, the ones that warn you that you are on the shoulder... very odd. I just had it in the shop where I bought it from, they replaced the #3 Cylinder coil and it's spark plug..but nothing else, apparently it was misfiring. Yet I just drove back and the vibration is still there.... :banghead:

Gageraid · **Posted:** Thu Apr 04, 2013 9:02 pm

It's the torque converter. There's a TSB for it. I had it done and it solved everything.

lfhoward · **Posted:** Thu Apr 04, 2013 9:04 pm

Does the vibration happen because the engine is lugging-- like the tranny should downshift, but isn't? If so, there is a TSB for that in the KK Tech section.

PepeTheMuleMN · **Posted:** Fri Apr 05, 2013 12:14 am

The tranny seems to downshift fine, it's just vibrating shortly before it shifts up, it may be something that only happens in higher RPM's? Thanks for the tips guys, this is my first time doing anything of this type, how does one go about using the TSB? I am out of warranty, or at least the standard jeep one... also its not really a shutter its more of a vibration like entering and leaving those road strips.

Gageraid · **Posted:** Fri Apr 05, 2013 2:13 pm

Go to the dealer. They can diagnose it or you can just have them perform it. It was $100.

PepeTheMuleMN · **Posted:** Fri Apr 05, 2013 6:39 pm

Heading back Monday, should still be under warranty..though it is a Ford dealer..oh well, I will keep this thread updated for future searches.

Gageraid · **Posted:** Sat Apr 06, 2013 12:20 pm

PepeTheMuleMN wrote:

Heading back Monday, should still be under warranty..though it is a Ford dealer..oh well, I will keep this thread updated for future searches.

Keep in mind there is a TSB for it if that's the case. I brought the paper in since the dealer wasn't really sure what I was talking about. It should be in the Technical section.

makeshift1801 · **Joined:** Sun Apr 03, 2011 10:34 pm **Posts:** 7

What's the TSB title/#?

Scar0 · **Posted:** Sun Apr 07, 2013 12:01 am

TSB 18-023-09 Flash Drone Sound Or Hesitation Feel Between 38 To 45 MPH
viewtopic.php?f=104&t=39066

makeshift1801 · **Joined:** Sun Apr 03, 2011 10:34 pm **Posts:** 7

Great, thanks!

PepeTheMuleMN · **Posted:** Tue Apr 09, 2013 3:12 pm

Alright, I guess I can walk in with that tonight, they still have not found anything "called about 10 minutes ago." I'm not sure how TSB's work with Ford dealers when you purchase used, but I should hope that they can determine something..I was even able to reproduce it with a technician in the vehicle the night I brought it in..

Though it does not feel like the TSB linked:

Quote:

Some customers may complain of a drone sound or a condition that feels like an irregular,
very short, slight deceleration as if the vehicle is being "tugged" from behind. This
condition exists between 1000 and 1600 rpm, 38 to 45 mph at constant speed. This
condition will be more noticeable during a light acceleration within the 38 to 45 mph vehicle
speed.

Its a vibration like road strips..who knows..

UPDATE: They won't be able to do the system flash at the Ford dealership "of course." But it seems that is likely the problem.. TSB18-023-09 that is.. I will let you guys know when I get time to take it to a Jeep shop.

Strange Vibration

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