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Ok so I’m not alone! Lol

yeah it’s so strange but your right it’s a low vibration in the seat and you can easily here the difference. I haven’t noticed anything with rpms raising or lowering when it does it so that’s a good thing. I also had it happen to me going from park to reverse however once I gave it some throttle it stopped. I have a 21 sp wb just a little over 550 miles
It did it yesterday on my drive home... now you've got me paying attention.

Sitting at a stoplight. In Drive. Foot on the Brakes. TRACK Mode. A/C Off. Windows Down.
The vibration started coming through the seat. I didn't touch the throttle. It vibrated for about 15 seconds.
No change in idle, or rpm. There is also a very low audible rumble that comes with the vibration.

It only did it once that I know of. Most of my drive home is highway.
 
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2018 Scat Pack SHAKER in Plum Crazy- GONE :-(
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I'm still thinking cooling fans kicking on, not sure who all said it. A tip might be to pull up gauges and check temps and volts, you might see volts drop then recover when they kick on, then spike and recover when they cut off. ALso you may see the temps up highish, then when they drop the fan cuts off.
If it is the fans, maybe a leaf, dead squirrel, part of a mustang... is stuck in it.
 
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2020 Dodge Challenger Hellraisin Scat Pack
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It did it yesterday on my drive home... now you've got me paying attention.

Sitting at a stoplight. In Drive. Foot on the Brakes. TRACK Mode. A/C Off. Windows Down.
The vibration started coming through the seat. I didn't touch the throttle. It vibrated for about 15 seconds.
No change in idle, or rpm. There is also a very low audible rumble that comes with the vibration.

It only did it once that I know of. Most of my drive home is highway.
Can't find the info but I seem to recall with track mode the engine coolant temperature is kept at a lower temperature. If I am not imagining this the radiator fan could come on more often and could even be run in high speed mode.

Have you tried using just normal/street mode under the same conditions to see if the behavior remains?
 

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21 Challenger SP WB TorRed, Carbon Dual Stripes, Carbon Black Rims, Red Caliper, Performance Spoiler
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Discussion Starter · #24 ·
Can't find the info but I seem to recall with track mode the engine coolant temperature is kept at a lower temperature. If I am not imagining this the radiator fan could come on more often and could even be run in high speed mode.

Have you tried using just normal/street mode under the same conditions to see if the behavior remains?
I can’t speak for HEMI Eagle but I know when the vibrations happened to me it was in my “auto” drive mode which is trans sport, traction street, steering sport and suspension sport. I have also noticed it in custom mode with my setup being track for trans and the rest in sport.
 

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unfortunately I don’t have any 93 octane gas stations within 50 miles of me. It’s all 87,89,91 octane
Even Sam's Clubs near me are 92 octane, although NOT a top tier gas. Costco IS one!
 

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Hey all!
So I was driving my new challenger scat pack today and noticed after about an hour of driving i am noticing the car vibrate while at a complete stop. It happens when idiling (drive park...etc) however it’s not every time. The vibration also only last about 15 seconds or so then it goes away. Once I give it gas all is returned to normal no vibration. Also to be clear the vibration is a very low vibration I can feel it in my seat however it does not shake the vehicle at all. I have almost 600 miles on it and so far no issues. I’m giving it more throttle now that it’s over 500 miles but any ideas?

I also wanted to add it’s almost 100 degrees out today and I’ve noticed my oil temp change ever so slightly randomly.
Hi Gregdetroit,
Sorry to hear you are experiencing this, we certainly understand why this would be concerning. If you end up addressing this with your local Dodge dealer, please let us know via PM. We'd be more than happy to provide you with an additional layer of assistance for that process.

Rob
Dodge Cares
 
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Hi Gregdetroit,
Sorry to hear you are experiencing this, we certainly understand why this would be concerning. If you end up addressing this with your local Dodge dealer, please let us know via PM. We'd be more than happy to provide you with an additional layer of assistance for that process.

Rob
Dodge Cares
The vibration we are feeling will have to be replicated and proven to the inspecting Dealer.
Even then... I can almost guarantee they will be clueless to the issue/ resolution.

I can’t speak for HEMI Eagle but I know when the vibrations happened to me it was in my “auto” drive mode which is trans sport, traction street, steering sport and suspension sport. I have also noticed it in custom mode with my setup being track for trans and the rest in sport.
I have experienced the strange vibration in TRACK and Auto Mode.
A/C ON or OFF. It's not the A/C Compressor Clutch engaging or disengaging.

I also always run SUNOCO 93 Octane Gas... I've never run anything different.
 

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Did you recently eat at Taco Bell? That can explain strange vibrations. Also, are you using your vented seats? It's pumping air in from the HVAC system, I can hear the fans ever so slightly under my seat. And man does that cool air feel good down there!
 

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Did you recently eat at Taco Bell? That can explain strange vibrations. Also, are you using your vented seats? It's pumping air in from the HVAC system, I can hear the fans ever so slightly under my seat. And man does that cool air feel good down there!
If and when I eat at the Border... I make sure to get it to go so I can be near a toilet at home. It's not Taco Bell.

The Vibration is not coming from the Ventilated Seat... I've turned the A/C OFF and ON during the vibration... it has no effect.
 

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The vibration we are feeling will have to be replicated and proven to the inspecting Dealer.
Even then... I can almost guarantee they will be clueless to the issue/ resolution.



I have experienced the strange vibration in TRACK and Auto Mode.
A/C ON or OFF. It's not the A/C Compressor Clutch engaging or disengaging.

I also always run SUNOCO 93 Octane Gas... I've never run anything different.
Hi HEMI Eagle,
We understand that you may be hesitant to work with your dealer. However, if you do, please know that we would be more than happy to escalate a case on your behalf to connect you with a Case Specialist who can provide you with an additional layer of support as you work with your dealer.

Rob
Dodge Cares
 

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2011 SRT8 392 BGE Supercharged Toxic Orange
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Just say'in... a little vibration could be normal... goodness knows what the on-board computer is doing while sitting idle at a light. If the TIPM is running tests, and playing with table values - it could be, it's just measuring/varying tolerances - and you "feel" it working in those vibrations.
Alternatively, it could be any resistance (fan, pumps, etc.) that "comes on" while the engine is idle.
Lastly, if you purhcase your fuel at a less than "ideal" vendor/distributor, you may want to consider "cleaning" additives. Be careful here though, some additives compete and or negatively interact. Before attempting such a thing I would ask the gas station to see the cast sheet for the fuel - that may (sometimes) tell you want additives it has in it. Cheap(er) stations will not have such records though.
Lastly, if the engine calls for 91, then 91 is what it wants. Going to 93, only ensures less detonation, and hence less chance of pulling timing under load. If you "exclusively" run 93 from birth though, the ECM adjusts for that, and puttling 91 in it will cause the engine to "feel" sluggish under acceleration.
Opinion Alert: Since my car was new - I have only ever run exclusively 93 Shell V-Power. It is the only 93 octane rating "washed" with nitrogen instead of alcohol. The residual nitrogen gives a nice smooth burn. Alcohol diminishes the octane and makes the combustion less effective.
 

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It did it yesterday on my drive home... now you've got me paying attention.

Sitting at a stoplight. In Drive. Foot on the Brakes. TRACK Mode. A/C Off. Windows Down.
The vibration started coming through the seat. I didn't touch the throttle. It vibrated for about 15 seconds.
No change in idle, or rpm. There is also a very low audible rumble that comes with the vibration.

It only did it once that I know of. Most of my drive home is highway.
Have you ever figured out what was going on with you car ?? I got a 21 scat pack charger and it has that vibration and rumble sound when it vibrates at idle and it does it in any mode and doesn’t matter if in park or in gear it still does it .. car has 15000 on it now and I got it with 10000 miles.. my wife drives it and told me the car was vibrating at the light. So I took it in 4 times now for this issue and they can’t figure it out so they blame it on the exhaust .. which I bought the car from dodge certified preowed like that .. well now I have a case open on the car through Chrysler and the head service guy rode with me in the car and he said he definitely hears it and it’s definitely concerning lol but before this they said they think it’s normal . Now there trying to find a stock exhaust to put on the car to rule that out .. which there is no way it’s the exhaust . They replaced the spark plugs and that didn’t fix it . They don’t know what the hell there doin in there but I know that rumble noise sounds like somthing is rolling around in there .. and there is no way it’s normal I sat in 6 other scats none of them did it but I sat in another used scat on a lot and it looked pretty beat up and that car did the rumble thing just like my car .. and it had a stock exhaust lol idk but all the other scats I sat it ran smooth.
 

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2020 Challenger Hellcat Widebody
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My Scat Pack is not the smoothest idling engine nor the most stable idling engine ever. Nothing severe enough that I think warrants taking the car in it appears to be just a characteristic of the engine.

What you might be experiencing is the onset of extra parasitic load -- arising from the alternator -- from the radiator fan switching from low speed to high speed or if the A/C is on the radiator fan switching from low speed to high speed.

If the A/C is on the A/C compressor could account for the vibration as it is adjusted to produce more compression of the refrigerant to increase cabin cooling.

Certainly as others have suggested you can try different gasoline. Be sure to buy the proper octane grade and buy from a busy station to ensure you get the freshest gasoline.

The oil temperature is not stable. It will go up if you drive the car in town, that is with stops with the engine idling of course followed by acceleration up to the limit -- even if it is just 35mph -- followed shortly by another stop and more idling. Under these conditions the oil temperature -- this my Scat Pack -- can climb to 230F. This is not at all worrisome. The oil's "40" (as in 0w-40) is determined at 212F so the oil is just barely over its nominal operating temperature at 230F. The elevated oil temperature helps remove water from the oil and that is a good thing.

Or if one leaves the town for the open road the oil temperature will drop some.

To someone not used to observing oil temperature in real time (and this applies to coolant temperature too) how oil temperature varies can be a bit of an eye opener. But as I was told when I asked the factory via a dealer about operating another car in elevated ambient temperature (116F) and the coolant temperature climbed to 226F and remained there that is if there is no warning light for low coolant level, no warning light for low oil level or elevated coolant temperature or low oil pressure, there is no problem.
I find this with my hellcat as well. When it's warmer out and the ac is on it has a slightly lumpy idle and can cause a slight but noticeable vibration in the cabin.

I'd just put it down as a feature of big engine, v8 firing cycle and some harmonics at that specific rpm with the suspension and engine mounts, plus some additional load at idle.

This is with bp 93 octane. So the gas should be OK at least. Oil temps and coolant is all fine although they do vary with driving style, but no warnings. I don't worry about it overmuch.
 

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O.K. this happened to my 20 SP the other day and it is definitely the cooling fan(s) kicking into HIGH Speed. It's the first time it happened and it happened 5 times in a row at a drive-thru when the fans kicked into high speed. I could hear them ROAR, then kick down and the vibration would go away. I had the A/C on, in gear or neutral the same, it was 96 outside and I was sitting in a slow drive-thru line against the building. It feels like something is breaking in the engine when it happens but then it stops completely.
 
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Hey all!
So I was driving my new challenger scat pack today and noticed after about an hour of driving i am noticing the car vibrate while at a complete stop. It happens when idiling (drive park...etc) however it’s not every time. The vibration also only last about 15 seconds or so then it goes away. Once I give it gas all is returned to normal no vibration. Also to be clear the vibration is a very low vibration I can feel it in my seat however it does not shake the vehicle at all. I have almost 600 miles on it and so far no issues. I’m giving it more throttle now that it’s over 500 miles but any ideas?

I also wanted to add it’s almost 100 degrees out today and I’ve noticed my oil temp change ever so slightly randomly.
Have you ever figured out what was going on with you car ?? I got a 21 scat pack charger and it has that vibration and rumble sound when it vibrates at idle and it does it in any mode and doesn’t matter if in park or in gear it still does it .. car has 15000 on it now and I got it with 11000 miles.. my wife drives it and told me the car was vibrating at the light. So I took it in 4 times now for this issue and they can’t figure it out so they blame it on the exhaust .. which I bought the car from dodge certified preowed like that .. well now I have a case open on the car through Chrysler and the head service guy rode with me in the car and he said he definitely hears it and it’s definitely concerning lol but before this they said they think it’s normal . Now there trying to find a stock exhaust to put on the car to rule that out .. which there is no way it’s the exhaust . They replaced the spark plugs and that didn’t fix it . They don’t know what the hell there doin in there but I know that rumble noise sounds like somthing is rolling around in there .. and there is no way it’s normal I sat in like 6 other scats none of them did it but I sat in 1 used scat on a lot and it looked pretty beat up and that car did the rumble thing just like my car .. and it had a stock exhaust lol idk but all the other scats I sat in ran smooth. I’ve sat in scats with exhausts and stock one they didn’t make that rumble vibration like the motor want s to misfire or somthing and it’s trying to correct itself .. idk but I know the rear end was whining and told them about that and after the second time bringing it in they replace the whole rearend .. we are so bummed about this car I’m just looking for answers maby find someone that had this problem and had got it fixed .. ithink who ever had the car first beat it up and put a lot of red line time on it
 
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