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Answer to Vibration at 55-58 MPH

37350 Views 191 Replies 53 Participants Last post by  pat31mtl, 
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A while back the problem of a slight vibration at at 55-58 mph was discussed. At the time the thinking was that it was the MDS. Well... I finally had the time to take it in to my friendly Chrysler dealer today. They confirmed what I was feeling and called the Chrysler hot line to see what they have to say. Apparently, Chrysler says that it is a known condition and is part of normal operation. It is NOT the MDS as many previously speculated, but is caused when the torque converter is fully locked and at just the right load on the engine it sets up a resonance or slight drone in the exhaust. This resonance is what is felt as a slight vibration. Chrysler hotline apparently confirmed exactly the symptoms and conditions that I described - - 55-58 mph around 1700rpm in 5th gear. Not that I'm happy there is this little glitch there to live with, but it is nice to know that nothing is "wrong."

The other problem they addressed while I was there was a creak and popping noise when the tilt steering wheel moved into the lower part of its travel. Turned out a brace for the steering column needed to have a bolt tightened. They also found the left front tire 1/2 oz. out of balance and balanced and properly torqued all 4 wheels. Most importantly, there doesn't appear to be and grease for me to try to clean out of my light, light, really light, gray interior!! :)
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ram 65

arnoldw said:
All I get are good vibrations :eek:
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Ihave a Magnesium 300c as well and I am happy to report all is fine as well.:cool:
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H
The vibration in my 300C occurs loudest between 55 & 60 MPH. It seems like there are two vibration frequencies occurring at the same time where the two frequencies are only a few vibrations per second apart thus causing a beat frequency of about 1 per second. In other words, the vibrations intensity increases then decreases in about 1 second intervals. This does not change when the engine is placed in neutral and the rpm's drop to idle. A plausible cause might be that the two drive shafts are out of balance and one may be traveling a few rpm's faster than the other thus causing the beat frequency described. (Beat frequency is a physics term). The frequency of the sound produced is very low -- possibly around 30 vibrations per second -- it sounds almost like the big speakers kids have in their cars that one hears when driving through a big city.
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2005_300c
i have the same problem, its like a sweet spot for rpms i feel it it the steering wheel gas peddel, its not normal becuase the car has not always done it,
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H
kampsvilleboy said:
A while back the problem of a slight vibration at at 55-58 mph was discussed. At the time the thinking was that it was the MDS. Well... I finally had the time to take it in to my friendly Chrysler dealer today. They confirmed what I was feeling and called the Chrysler hot line to see what they have to say. Apparently, Chrysler says that it is a known condition and is part of normal operation. It is NOT the MDS as many previously speculated, but is caused when the torque converter is fully locked and at just the right load on the engine it sets up a resonance or slight drone in the exhaust. This resonance is what is felt as a slight vibration. Chrysler hotline apparently confirmed exactly the symptoms and conditions that I described - - 55-58 mph around 1700rpm in 5th gear. Not that I'm happy there is this little glitch there to live with, but it is nice to know that nothing is "wrong."

The other problem they addressed while I was there was a creak and popping noise when the tilt steering wheel moved into the lower part of its travel. Turned out a brace for the steering column needed to have a bolt tightened. They also found the left front tire 1/2 oz. out of balance and balanced and properly torqued all 4 wheels. Most importantly, there doesn't appear to be and grease for me to try to clean out of my light, light, really light, gray interior!! :)
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H
I don't think the vibration at about 60 mph in my 08 300C is from resonance in the exhaust since the vibration continues at the same intensity if the engine is brought down to idle at 60 mph -- this would certainly change any resonance in the exhaust. I still think it's in two drive shafts not in balance though I still have to bring it in to have this checked out, or something of that nature.
Does anyone have any other ideas?
HotRog
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Read This !!!!!

kampsvilleboy said:
A while back the problem of a slight vibration at at 55-58 mph was discussed. At the time the thinking was that it was the MDS. Well... I finally had the time to take it in to my friendly Chrysler dealer today. They confirmed what I was feeling and called the Chrysler hot line to see what they have to say. Apparently, Chrysler says that it is a known condition and is part of normal operation. It is NOT the MDS as many previously speculated, but is caused when the torque converter is fully locked and at just the right load on the engine it sets up a resonance or slight drone in the exhaust. This resonance is what is felt as a slight vibration. Chrysler hotline apparently confirmed exactly the symptoms and conditions that I described - - 55-58 mph around 1700rpm in 5th gear. Not that I'm happy there is this little glitch there to live with, but it is nice to know that nothing is "wrong."

The other problem they addressed while I was there was a creak and popping noise when the tilt steering wheel moved into the lower part of its travel. Turned out a brace for the steering column needed to have a bolt tightened. They also found the left front tire 1/2 oz. out of balance and balanced and properly torqued all 4 wheels. Most importantly, there doesn't appear to be and grease for me to try to clean out of my light, light, really light, gray interior!! :)
Click to expand...

Well i am very happy to hear about that but you wont be happy about my experience !!!!

So i can tell you right from the start your dealer gave you BS , they did the same thing to me , i Have a 300c awd 2006 hummmm love my car BUT i was experiencing the same BRRRRRRRRR TRRRRRRRR around 1800RPM or 40mph

then i didnt do nothing until the noise become more more anoying ... Then went to the dealer ... my car was around 110000km so no more warranty so they told me the computer say " TORQUE CONVERTER " so i went to a tranmittion guy and i bought and install a new Torque converter then 2 month later THE SAGA STRYKE BACK !!!! go back to my guy for the transmittion he doesnt understand sweet f.... but tell's me leave it here for the week ill v find it ... turn around that he's saying that the body valve is causing this ... so change de body valve and the torque converter again ... cuz the gears were damage ... the BRRRRRRR and THE trrrrrrrr that you feel is the torque converter trying to lock but at the same time :) eats a bit of your parts :) so here we go again i have done does change ..... and beleive it or not ... 2 month later almost last weeks !!!!!! its have begin to do it again ....

So my problem is that i dont know nothign about car ... but i am not stupid ...;) i think :p lol so if someone really found what is causing all that please email me call me save me !!!! :tongue-ti
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!!

Northern Rider said:
If you have a 300C AWD, please try this test. Run your car at 55 mph in drive.

Gently accelerate up to 58 -59 mph. Do you feel a low frequency vibration? It will be like running over a rumble strip. You will feel it rather than hear it. You will notice the images in your rear view mirror going fuzzy. As you go to higher speeds it will go away.

If your car does not have this problem, please report back as well.

We need to find out if this problem happens with the 300C AWD. We would appreciate any feedback you can give us.

Thanks.
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yep i have a awd 2006 does exacly this !!!!
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i have an 06 300c my dome lights turn signals clock and temp controls wont light up..and also my trunk opener and key button wont open the trunk checked all the fuses ne ideas?...
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Tomi33
I have a 2005 300C RWD. I have the vibration in the gas pedal at 50/90km/hour. It is indeed the MDS kicking in. If you get the predator and shut it down, it barely effects your fuel mileage but the vibration is completly gone. I am getting 8.9L/100km highway at a constant 90km/hour cruising speed on back roads. In your face chrysler! lol.

To find out if its your torque converter, while cruising, gently push the brake pedal, but not enough to slow down, but just enough to get the lights on. This disengages the torque converter. If it still vibrates, than its your MDS.

To check if its your MDS causing the vibration, tap the shifter into 4th gear, if the vibration goes away. Its your MDS running in 4cyl. The ONLY way to get rid of the annoying vibration is to get the MDS shut off using a programmer.
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D
Back in the day DESIREE had the 55-58 MPH vibration. The stealership replaced the rightside resonator and pipe up to the suitcase. Goodbye vibration!
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H
The vibration that I experience occurs around 55 to 60, can't be any resonance in the muffler -- the throttle pressure would certainly affect it. I still think it is in the drive train involving the AWD. I have placed the gear shift into neutral at about 60 mph and the drone, where the vibration increases and decreases about one every 3 seconds, continues with the same intensity -- that certainly would remove the muffler from suspicion. I feel it's like the two drive shafts are out of balance and as they change positions with respect to each other, this causes the drone effect. I realize this scenario probably is totally wrong but that's how it sounds. One person stated it's not a problem because all the 300s have it. It's not????????? Then it's an inherent problem, and annoying it is! I hope someone comes up with the real answer. I feel only the company engineers can solve this problem (or they don't have a clue either).

HotRog
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Welcome to the club ... of that annoying problem ... here's my experience ... and weird ... went to a transmission specialist 1st he did change the torque converter ... then voila no more sound vibration .... 2 months later it came back .... change the torque again ... didnt work change the body valve ... et voila no more vibration and sound .... 2 month later it came back again ... so my tough on that i dont know nothing about cars but i know something is causing my torque and body valve going bad .... the other thing is if i use manual shifting and wait the rev to be higher then 3000 rpm no sound no vibration ... but no economy on the GAZ :p ill give you more info i just receive my corsa Xtreme with my sping i will do a fine tune with predator and try to play with the shifting timing to see if it can solve the problem ....

Patrick Denis
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