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Old 08-19-2011, 02:33 PM
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2012 6 speed manual shifter shimmy.

Shakes like CRAZY while traveling down the road.
Side to side.
Like one of those "shake weights" in your right hand.

Anyone else notice this?
Did Jeep forget a few bolts or an isolation mount?
Did the change in the engine length require vastly different trans mounts?
On the 03 Rubicon it was not even noticeable at highway speeds.


I will have the dealer check it next week when in for an unrelated matter.

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Old 08-19-2011, 02:45 PM   #2
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This is normal. shakes some on mine, but this was expected...plus i am used to keeping my hand on the shift knob most of the time, so it mitigates it some. I even put a billet knob on mind which probably makes the shaking a little worse, but i still do not regard it as bad.

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Old 08-19-2011, 02:55 PM
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Originally Posted by SlackerMD View Post
This is normal. shakes some on mine, but this was expected...plus i am used to keeping my hand on the shift knob most of the time, so it mitigates it some. I even put a billet knob on mind which probably makes the shaking a little worse, but i still do not regard it as bad.
It appears excessive to me.

Don't want it to pop out of gear!

Have a Corvette that doesn't do that at 130mph.
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Old 08-19-2011, 03:00 PM   #4
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It appears excessive to me.

Don't want it to pop out of gear!

Have a Corvette that doesn't do that at 130mph.
but keep in mind, your jeep is a body-on-frame construction, unlike your corvette..that stick is your direct link to the "frame"
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Old 08-19-2011, 03:04 PM   #5
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Welcome to owning a Jeep. The engine is mounted longitudinally so the gear shifter literally stick out of the transmission into the interior. So they don't have a linkage with bushing to dampen those vibrations.
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Old 08-19-2011, 03:09 PM   #6
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I agree some shaking is normal, but if it's really alarming something may be wrong.

I'd take it back to the dealer and test drive a few others to see how they respond.
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Old 08-19-2011, 03:13 PM   #7
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I just picked mine up Wednesday and noticed the exact same thing. Our crappy roads here in northern Nevada have that thing rockin like crazy. I too was thinking there must be a mount or bushing missing. I have had 4 other Jeeps that were NOT like this. Must have something to do with the 3.6 application??? Glad to hear It ain`t just me.
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Old 08-19-2011, 05:44 PM
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I just picked mine up Wednesday and noticed the exact same thing. Our crappy roads here in northern Nevada have that thing rockin like crazy. I too was thinking there must be a mount or bushing missing. I have had 4 other Jeeps that were NOT like this. Must have something to do with the 3.6 application??? Glad to hear It ain`t just me.
My old Rubicon with the MT/R Goodyears, the 4.10 axle, and a 5 speed didn't have the gearshift shake like this one.
SCREAMING down the road.

It moves a probably 2-3 inches off center each way.

I think it may be due to the new motor mounting to the transmission.

I also have had a Crew Cab pickup with a 6 speed, body on frame, that did not have the tranny shake like this does.

FWIW,

The Corvette is body on frame.
That is why people unbolt and separate the top from the bottom to do a "frame-off" restoration.

Just fiberglass instead of metal.
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Old 08-19-2011, 07:13 PM   #9
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Howdy,
if the shifter on the Jeep is mounted to the transmission it will always be aligned and shiftable. If it is mounted on the frame, when the motor torques the shifter will not be aligned with the transmission and wont shift. I remember this from the days of 68 Camaros versus 69 Camaros. The 68s mounted to the transmission and the 69s mounted to the frame. When they torqued and ran over rough roads, the 69s wouldnt shift. Since Jeeps often hit rough going it is a good thing that they are transmission mounted. Have a goodun!!!!!
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Old 08-19-2011, 08:12 PM   #11
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Mine does it but it doesn't bother me.
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Old 08-19-2011, 08:21 PM   #12
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Just wait till winter when it gets real cold and kicks out of gear. Then the shacking wont seem so bad
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Old 08-19-2011, 08:25 PM   #13
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Quote:
Originally Posted by rics1997
Just wait till winter when it gets real cold and kicks out of gear. Then the shacking wont seem so bad
Already havin clutch issues. Can't wait
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Old 08-19-2011, 10:44 PM
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Just wait till winter when it gets real cold and kicks out of gear. Then the shacking wont seem so bad
rics,

I see you have an automatic.
With the 3.8L.

This is about the 6 speed.
With a Pentastar.

BTW, what is shacking?
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Old 08-19-2011, 10:50 PM   #15
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I know it is the 6 speed manual which is the same 6 speed manual as the 3.8 used and there is a issue with it popping out of gear in cold weather. Not every single one but a high majority. There are huge threads on it but usually only active in the winter months because that is when the issue appears. Maybe the 2012 Jeeps fixed this issue but they hadn't for the last 4 years. There is even a service bulletin on it but no real solution

One of the threads on the issue

https://www.wranglerforum.com/f33/6-s...ear-35605.html
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Old 08-19-2011, 11:49 PM   #16
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Picked up my '12 sport tonight with the 6 speed. First thing I noticed on my drive home was the shifter shaking over *slight* bumps in the road. Definitely not ideal - I would assume a recall within the next 2 months. Fortunately, not a major issue. Absolutely thrilled with the car otherwise.
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Old 08-20-2011, 05:19 AM   #17
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My '11 does this, ususlly when I hit bumps though. I was suprised at first as well, my old F150 with a stick didn't do that.... I think it may be due to the type of front suspension it has, maybe the bumps travel up the driveline a bit more. Should I take mine in?

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