Strange noise from new 2018 Compass Limited - Jeep Compass Forum
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post #1 of 19 Old 03-28-2019, 01:12 AM Thread Starter
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Strange noise from new 2018 Compass Limited

We bought a 2018 Jeep Compass Limited all of 7,600 miles ago. So far our only real gripe is a repeating noise while driving. I can't tell if the tranny is downshifting while on the flat or the 4 wheel drive is acting up. To me it sounds like a very deep grinding noise. Sometimes grabbing the shift handle and slapping into a higher gear, assuming the idiot computer will let me, seems to stop the noise, but not always. Is this normal or are we on the way to driving a bottomless pit?
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post #2 of 19 Old 03-28-2019, 11:53 AM
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It is "normal" but your dealer still has a fix. It is TSB #08-095-18

You can also make it go away by switching off the ESC. There is debate about whether or not this is a good idea since ESC is a safety device.

Read some of the discussion about it here: https://www.myjeepcompass.com/forums...in-issues.html Someone on that thread posted a copy of the actual TSB.

I had it done and it raises the speed at which you hear it to around 50MPH where it is drowned out by road noise. Now I get a <clunk> when decelerating as I pass down through 38MPH.
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Last edited by Jasmine; 03-28-2019 at 05:00 PM.
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post #3 of 19 Old 03-28-2019, 03:01 PM
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Quote:
Originally Posted by happyCamper View Post
We bought a 2018 Jeep Compass Limited all of 7,600 miles ago. So far our only real gripe is a repeating noise while driving. I can't tell if the tranny is downshifting while on the flat or the 4 wheel drive is acting up. To me it sounds like a very deep grinding noise. Sometimes grabbing the shift handle and slapping into a higher gear, assuming the idiot computer will let me, seems to stop the noise, but not always. Is this normal or are we on the way to driving a bottomless pit?
Hi happyCamper,
We're sorry to hear that you are experiencing this. If you decide to have your dealer address this, please send us a private message and we would be happy to offer additional assistance!
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post #4 of 19 Old 04-22-2019, 05:53 PM
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Is this the same noise that would sound like the engine downshifting when you're driving at 35-40mph at 2000 RPMs, but it sounds like the engine is at 5000-6000 RPMs??
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post #5 of 19 Old 04-22-2019, 11:58 PM
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No, my noise sounded more like a clutch bearing (it wasn't, I'm just offering that for comparison). It was more of a persistent grumble, but very noticeable. Maybe sounds a bit like some aggressive AT tires, but it didn't start till around 30MPH. As above, the software update moved the speed to 50ish so road noise pretty much drowns it out. I'm taking off the snow tires tomorrow so I'll be able to hear the noise better after this.

In my case I can make the noise go away if I turn off the ESC. If turning off the ESC makes your noise go away, then its probably the same thing. From what I've read on here some drivers hardly notice it, others say its deafening; I guess I'm in between. Apparently its different from one vehicle to another.
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post #6 of 19 Old 04-27-2019, 02:18 AM
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The dreaded 4WD noises only a Compass could make. Turn off ESC or put it on 4WD lock and the noise goes away.
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post #7 of 19 Old 04-27-2019, 12:26 PM
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Originally Posted by jjcom View Post
The dreaded 4WD noises only a Compass could make. Turn off ESC or put it on 4WD lock and the noise goes away.
I'd think long and hard before running in 4wd lock all the time. That would be rough on tires and fuel economy.
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post #8 of 19 Old 04-29-2019, 08:10 PM
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Hi i,m Bernie the noise you have sounds like the same on i have in my 2018 compass and the dealership says its a software issue that chrysler has known about since november 2018 im on a waiting list for this update.. talk to your dealer and ask about service bulleten on lt..i was told that it was trying to change to change to 4x4 and wasn,t engaging properly my noise sounds like water hitting a vinyl sided house when you wash it with garden hose.my noise stops if i manually put it in 4x4.
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post #9 of 19 Old 04-30-2019, 09:11 AM
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Quote:
Originally Posted by Jasmine View Post
It is "normal" but your dealer still has a fix. It is TSB #08-095-18

You can also make it go away by switching off the ESC. There is debate about whether or not this is a good idea since ESC is a safety device.

Read some of the discussion about it here: https://www.myjeepcompass.com/forums...in-issues.html Someone on that thread posted a copy of the actual TSB.

I had it done and it raises the speed at which you hear it to around 50MPH where it is drowned out by road noise. Now I get a <clunk> when decelerating as I pass down through 38MPH.
I went to the dealer and they told me that they didn't "really" hear the noise, and they said there wasn't any active recall on the VIN.

Still, in order to fix it I either switch to the manual setting, or turn off the anti-skid and it fixes the noise.

edit: and I went to the thread you linked and people made all the same comments....I'm going to have to contact FCA.
As a side note, I am also seeing a difference in overall performance, driveability and fuel economy.

Last edited by sam's compass; 04-30-2019 at 09:16 AM.
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post #10 of 19 Old 04-30-2019, 12:47 PM
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Originally Posted by sam's compass View Post
As a side note, I am also seeing a difference in overall performance, driveability and fuel economy.
I presume you mean these things are diminished? By what measure? Performance and driveablility are subjective but fuel economy can be documented. Is it worse with the ESC off? My first thought is that fuel economy and performance would actually improve with devices turned off.
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post #11 of 19 Old 04-30-2019, 01:52 PM
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Fuel economy changes far too much with the wind and the weather, the seasonal blends of fuel, different traffic around you, regional differences with more or less hills, elevation, different paths you take on your errands, etc. to use it as any kind of genuine measuring stick for a problem. It *might* give you a hint but you have to be supremely good at salting your data you are collecting and mentally offsetting it against the many continuously changing driving conditions. Most people are not capable of that (although they will think they are), and you don't want to get people thinking they can use fuel average guesstimates from the computer as indications of whether all is right with their car. You are going to end up with people who think they have problems coming and going every other tank because that tank average went up or down 2-3 MPG. I mean, come on, we can barely keep up with explaining to people that they have to manually reset the fuel average after each fillup.

People come on here and throw out their problems and try to use their fuel economy as evidence or symptoms of their problems all the time. I flat-out ignore anything anyone tells me that they have determined based on a couple of tanks of fuel in who knows what driving conditions. Its completely useless extra unrelated data.
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post #12 of 19 Old 04-30-2019, 03:06 PM
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Quote:
Originally Posted by sam's compass View Post
I went to the dealer and they told me that they didn't "really" hear the noise, and they said there wasn't any active recall on the VIN.

Still, in order to fix it I either switch to the manual setting, or turn off the anti-skid and it fixes the noise.

edit: and I went to the thread you linked and people made all the same comments....I'm going to have to contact FCA.
As a side note, I am also seeing a difference in overall performance, driveability and fuel economy.
Hi sam's compass,
We’re sorry to hear about this. We certainly understand how frustrating this may be. Please send us a private message if you need to return to the dealer so we can have this documented and provide you with additional assistance while your dealer works on a diagnosis.
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post #13 of 19 Old 05-07-2019, 08:37 PM
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Sorry for the long time between responses.
The sound and fuel economy change with the use of the traction control system.
I will be in the "sweet spot" of the noise because I haven't turned off the traction control, but immediately after I turn it off the noise goes away - meaning at the moment I push the button.
This is also when I notice a change in fuel efficiency - at about 1 1/2 to two miles per gallon when driving for efficiency in my environment.
As far as driving, I have noticed that the car just drives better with the TC off. It almost feels like it is fighting me with the system off. The transmission also seems to perform as if more comfortable with the power of the engine. I have no problems with acceleration, and the transmission shifts smoothly and sensibly through the gears.
I do not drive with ESC off, although I notice the engine further "relaxing", without the ability to convey a better term, when I turn it off. There is no noticeable effect on fuel efficiency, power, or gear efficiency.

As far as other comments that have seen the service bulletin, I think that FCA needs to push the update to all VINs. I took mine to the mechanic administering my warranty, and they told me that I didn't need a computer update per their system - about 3 weeks ago.
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post #14 of 19 Old 05-07-2019, 08:46 PM
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Quote:
Originally Posted by arudlang View Post
Fuel economy changes far too much with the wind and the weather, the seasonal blends of fuel, different traffic around you, regional differences with more or less hills, elevation, different paths you take on your errands, etc. to use it as any kind of genuine measuring stick for a problem. It *might* give you a hint but you have to be supremely good at salting your data you are collecting and mentally offsetting it against the many continuously changing driving conditions. Most people are not capable of that (although they will think they are), and you don't want to get people thinking they can use fuel average guesstimates from the computer as indications of whether all is right with their car. You are going to end up with people who think they have problems coming and going every other tank because that tank average went up or down 2-3 MPG. I mean, come on, we can barely keep up with explaining to people that they have to manually reset the fuel average after each fillup.

People come on here and throw out their problems and try to use their fuel economy as evidence or symptoms of their problems all the time. I flat-out ignore anything anyone tells me that they have determined based on a couple of tanks of fuel in who knows what driving conditions. Its completely useless extra unrelated data.

I appreciate the advice.
You are right, it is difficult to prove, especially considering the lack of consistency in driving overall. You never know when you are going to hit a traffic jam.
However, I am generally cognizant of how quickly the throttle responds, and I can say that there is a significant difference between the throttle with traction control off and traction control on, and that over a driving period you can really see the difference in gentle driving conditions in how fuel economy is affected by traction control.

For me, I started out at about 23.4-23.9, with mixed driving.
Over time, fuel economy rose to about 24.2.
After I started turning off TSC, it rose to 24.7 - this is for the main, overall, since purchase fuel consumption average.
I also reset my gauge, and it reads between 25 and 27 MPG, depending on the balance of road driving for the period. Some of that is just due to the engine being broken in, but more of it is due to the traction control, especially with the timing of the changes.
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post #15 of 19 Old 05-07-2019, 10:17 PM
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@sam's compass
I'm amazed at the change in your fuel economy, but I'm also amazed how low it is. Granted most of my driving is rural highways or expressways (I rarely exceed 65) but I'm averaging well over 30MPG. I was running about 28-29MPG during the winter with colder temperatures and snow tires, but now with summer tires and temps in the 60sF I'm back up to 33MPG.

So you really think turning ESC off improves fuel economy? I'd wondered about that myself, but there are so many hills around here that its hard to get a statistically significant reading. Also, since my MPG is generally over 30MPG the little indicator on the dashboard doesn't go high enough to show my actual/instant MPG.
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post #16 of 19 Old 05-07-2019, 10:23 PM
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Also, since my MPG is generally over 30MPG the little indicator on the dashboard doesn't go high enough to show my actual/instant MPG.
Doesn't the indicator go all the way to 99mpg? That is at least the case for me, maybe different software version.
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post #17 of 19 Old 05-08-2019, 01:27 PM
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Doesn't the indicator go all the way to 99mpg? That is at least the case for me, maybe different software version.
Its Position 3 on the DIS. Screen says "Fuel Economy" Below it is a graphic that looks like this: 0lllllllllllllllllll30 with a little cursor that points to the instant fuel economy -- the cursor position fluctuates if I step on the gas or take my foot off the pedal. Then below that mine says, average fuel economy 30.3 MPG.

In Postion 4 I have odometers A and B. I use A for my present tank and I only change B when I change my tires. That's how I know what my average economy was this past winter compared to last summer.
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post #18 of 19 Old 05-08-2019, 04:27 PM
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Strange noise from new 2018 Compass Limited

Quote:
Originally Posted by Jasmine View Post
Its Position 3 on the DIS. Screen says "Fuel Economy" Below it is a graphic that looks like this: 0lllllllllllllllllll30 with a little cursor that points to the instant fuel economy -- the cursor position fluctuates if I step on the gas or take my foot off the pedal. Then below that mine says, average fuel economy 30.3 MPG.



In Postion 4 I have odometers A and B. I use A for my present tank and I only change B when I change my tires. That's how I know what my average economy was this past winter compared to last summer.


Hmm, I think we either have different displays or different versions of the software. My display looks nothing like you described. In my case, there is a gauge-like thing that shows the MPG number between 0-40 and the display below it can show it between 0-99. I think I have a picture of that, I will post it if I can find it.



In the other position, I also have mpg values for trips A and B. I think that part is the same.


Edit; okay I got this picture of it from a while back.

Last edited by Tripod; 05-08-2019 at 04:31 PM.
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post #19 of 19 Old 05-09-2019, 12:39 AM
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Tripod, your photo is better than mine, but judging by your moniker maybe you're a professional photographer. I presume the difference in our EVICs is a year-to-year change. Going to 40MPG makes more sense since 30MPG is easily achievable.
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