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Old 11-06-2018, 12:58 PM   #26
aero23
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Default 2015 too

After bringing my 2015 in this morning to have my 4th gear vibration looked at, I finally found this thread.

Go easy on this guy; if you drive a manual you should know that you don't need to leave your hand on the gear lever to know it's vibrating. If you know it's vibrating, you can't reasonably shrug it off as nothing. What if it's a bad detent or loose shift fork? Like he said, how are you not touching the gear lever when you change gears?

Mine also shows this from time to time while still in 3rd and pulling out to go to 4th. Sometimes in 4th it's really bad, sometimes it minimal, sometimes it's not there at all. Regardless of how bad it is, it goes away when I let off the gas.

I found out, after going under the car, that there is no mechanical linkage so it's either internal to the gearbox or at the base of the shifter. It's POSSIBLE that it is the cables themselves vibrating, but that doesn't make sense with how it feels and the fact that it's only 4th.

I vote for internal. My cables sheaths were all tightly attached at the ends (as far as I could tell anyway). If that is true, then on/off the gas shouldn't make a difference. With helical cut gears however, internally the gears will have a thrust that changes when on/off the gas. This will change the force on the shift fork. This scenario means it could get worse over time, and be very expensive. This is why I brought it in. Hopefully they about this and it's not as bad as I imagined above. Hopefully it's an easier fix, but it sounds like that may not be the case.

Anyway, good to hear that many others are experiencing it (for my sake anyway - sorry). Not good to hear that it spans model generations and Subaru hasn't fixed it.
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Old 11-06-2018, 09:58 PM   #27
jasonwrx86
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Mine buzz because the silver ring just below the knob above the reverse lock out is a tad loose. Is it normal for your guys? Yes 4 gear around 2000 rpm under heavy load is when it vibrates the most.
Personally, I think the vibration is from the transmission vibrating. Maybe 4th gear is in a position that any lateral vibration of the transmission is transmitted though the cable to the shifter assembly.
There are two cables, one for front to back movement and one for left to right movement.
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Old 11-07-2018, 04:26 PM   #28
aero23
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Default Dealership reply to my 4th gear vibration issue

This may be old news to some, but for those who don't know: (This is from the desk rep in the service department at my dealership on 11-06-2018.) Subaru knows about the issue and is working on a fix. It requires a new part but it is not available yet. When it is available, a bulletin will be going out and this person *thinks* that it should be covered no matter what the mileage is. They know enough about it to go in and replace with the current design part if I pay for it (which I am not doing, unless things get really bad, in which case I will do it myself so long as I don't have to go through taking the whole tranny out - done that enough times on other cars I'm getting tired of that kind of work.)

Anyway - if anyone has more detailed info, I would love to know what you found out.

Last edited by aero23; 11-07-2018 at 10:58 PM.
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Old 11-07-2018, 06:57 PM   #29
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That's great to hear. I have had this issue from pretty much a month after I picked up my 2018 WRX Limited. I brought this to the attention of the service department when I went in for an oil change, and they weren't helpful. Pretty much shrugged off the issue.
On my car, the knob vibrates when accelerating or going steady in 4th. Sometimes the vibration noise is actually audible. Very annoying to say the least.

Hope Subaru releases a fix soon.

Quote:
Originally Posted by aero23 View Post
This may be old news to some, but for those who don't know: (This is from the desk rep in the service department at my dealership on 11-06-2018.) Subaru knows about the issue and is working on a fix. It requires a new part but it is not available yet. When it is available, a bulletin will be going out and this person *thinks* that it should be covered no matter what the mileage is. They know enough about it to go in and replace with the current design part if I pay for it (which I am not doing, unless things get really bad, in which case I will do it so long as I don't have to go through taking the whole tranny out - done that enough times on other cars I'm getting tired of that kind of work.)

Anyway - if anyone has more detailed info, I would love to know what you found out.
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Old 11-30-2018, 12:08 AM   #30
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Quote:
Originally Posted by aero23 View Post
This may be old news to some, but for those who don't know: (This is from the desk rep in the service department at my dealership on 11-06-2018.) Subaru knows about the issue and is working on a fix. It requires a new part but it is not available yet. When it is available, a bulletin will be going out and this person *thinks* that it should be covered no matter what the mileage is. They know enough about it to go in and replace with the current design part if I pay for it (which I am not doing, unless things get really bad, in which case I will do it myself so long as I don't have to go through taking the whole tranny out - done that enough times on other cars I'm getting tired of that kind of work.)

Anyway - if anyone has more detailed info, I would love to know what you found out.
Thanks for the update. I've just noticed my 2018 doing the same thing over the last week.
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Old 11-30-2018, 09:32 AM   #31
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I've noticed the same thing in my WRX, but it's not just 4th gear but any gear. Or maybe it is just in 4th. I'll pay more attention today on my long drive home. But it is directly related more to engine tach and load. Putting more power down seems to smooth it out. It's only extent when cruising or light throttle and in a specific rev range I've yet to really fully determine the range of. I normally notice it at 3k, and upshifting or downshifting doesn't help, but getting on the throttle and increasing revs does.

I think this might be a harmonic damping issue, maybe? B/c this is cable shifted, the vibrations are probably being transmitted through the body to the shifter assembly. It's not enough to notice in my body, but enough to vibrate a weighted pendulum like the shifter lever.

Thoughts?

Want to bet that stiffer engine mounts will make this particular annoyance greater?
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Old 11-30-2018, 09:43 AM   #32
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Quote:
Originally Posted by SirBrass View Post
I've noticed the same thing in my WRX, but it's not just 4th gear but any gear. Or maybe it is just in 4th. I'll pay more attention today on my long drive home. But it is directly related more to engine tach and load. Putting more power down seems to smooth it out. It's only extent when cruising or light throttle and in a specific rev range I've yet to really fully determine the range of. I normally notice it at 3k, and upshifting or downshifting doesn't help, but getting on the throttle and increasing revs does.

I think this might be a harmonic damping issue, maybe? B/c this is cable shifted, the vibrations are probably being transmitted through the body to the shifter assembly. It's not enough to notice in my body, but enough to vibrate a weighted pendulum like the shifter lever.

Thoughts?

Want to bet that stiffer engine mounts will make this particular annoyance greater?
Sounds like a different issue than what I'm experiencing. Mine is only 4th gear, and only low rpms (1800-2700) under load. Goes away when I let off the gas or get around 3k.
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Old 11-30-2018, 11:30 PM   #33
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Quote:
Originally Posted by SirBrass View Post
I've noticed the same thing in my WRX, but it's not just 4th gear but any gear. Or maybe it is just in 4th. I'll pay more attention today on my long drive home. But it is directly related more to engine tach and load. Putting more power down seems to smooth it out. It's only extent when cruising or light throttle and in a specific rev range I've yet to really fully determine the range of. I normally notice it at 3k, and upshifting or downshifting doesn't help, but getting on the throttle and increasing revs does.

I think this might be a harmonic damping issue, maybe? B/c this is cable shifted, the vibrations are probably being transmitted through the body to the shifter assembly. It's not enough to notice in my body, but enough to vibrate a weighted pendulum like the shifter lever.

Thoughts?

Want to bet that stiffer engine mounts will make this particular annoyance greater?
I'm in the same boat with STS-WRX. We're only getting it in 4th (although sometimes I notice it in third a tiny bit when I shift to 4th). For me it's also not consistent. Sometimes it's not there at all. Sometimes it's really bad, sometimes it's in between. It seems like lately it's occurring a little less too. I just hope that Subaru does come out with a fix and will fix for free when we're past the power train warranty.

If you are truly getting it in all gears, then maybe you do have something loose and it is vibration of the cable(s).
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Old 12-01-2018, 01:56 AM   #34
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I paid attention today and it is only in 4th.

But if I jiggle it in gear, it stops.
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Old 12-10-2018, 11:00 PM   #35
althekiller
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My 2018 has been doing it since day 1. 4th gear vibration (probably not a big deal) but the rattling sound it causes from the shifter is SO aggravating. Dealership said everything was normal and I've just been putting up with it for the last year. Only in 4th gear between 2300-2500 rpm, while accelerating.
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Old 12-10-2018, 11:02 PM   #36
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Quote:
Originally Posted by althekiller View Post
My 2018 has been doing it since day 1. 4th gear vibration (probably not a big deal) but the rattling sound it causes from the shifter is SO aggravating. Dealership said everything was normal and I've just been putting up with it for the last year. Only in 4th gear between 2300-2500 rpm, while accelerating.
I have a friend who is a senior service tech at the local dealership. He said there will be either a TSB or recall for it.
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Old 12-10-2018, 11:24 PM   #37
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Quote:
Originally Posted by Pooterskinerd View Post
Alright, so it's just the stock mounts but nothing to be worried about ? It's common issue I assume. But can be fixed with new mounts even tho that would make my OCD even worse with every sound I hear like direct injection I feel rumble at idle, ****ty rev hang and linear throttle response issues
Cars aren't perfect, bro. Try to stop focusing on it like it's an issue and just realize that it's part of the car. All cars have their quirks. My STI is full of them.
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Old 12-10-2018, 11:34 PM   #38
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Quote:
Originally Posted by STS_WRX View Post
I have a friend who is a senior service tech at the local dealership. He said there will be either a TSB or recall for it.
From my experimenting, when on throttle, the shifter moves back very slightly and the vibration only happens when on throttle. The vibration also is related to the engine load so it's not coming from inside of the transmission but rather the whole drive train.
I think it's the cable when under load is fully tensioned causing the vibration being transmitted to the shifter. The shift when under load in that gear could be from the shift of the shift fork when under load.
I would imagine the fix would be some kind of stopper on the shifter keeping it from moving too far in 4th gear over tensioning the cable.
I wonder when driving if you slightly push the shifter forward in 4th gear when this happening does the vibration go away.

Last edited by jasonwrx86; 12-10-2018 at 11:49 PM.
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Old 12-11-2018, 10:05 AM   #39
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In 4th gear, you're pushing the cable forward. If you jiggle the shifter within the boundaries of the gate, you'll find the vibration disappears when you push the shifter within that "zone" forward about 1mm.

This tells me that something along the cable line is contacting a vibrating surface when in 4th.
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Old 12-11-2018, 10:07 AM   #40
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Quote:
Originally Posted by Pooterskinerd View Post
Alright, so it's just the stock mounts but nothing to be worried about ? It's common issue I assume. But can be fixed with new mounts even tho that would make my OCD even worse with every sound I hear like direct injection I feel rumble at idle, ****ty rev hang and linear throttle response issues
If you are this nervous about every squeak and creak, then you need to get yourself an EV. That way the only sound that'll be there to possibly make you nervous is road noise through the tires.

ICE cars make noises. If they were so tight that they couldn't, they'd fall apart from vibrations of the road very rapidly.
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Old 12-11-2018, 12:48 PM   #41
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Quote:
Originally Posted by SirBrass View Post
In 4th gear, you're pushing the cable forward. If you jiggle the shifter within the boundaries of the gate, you'll find the vibration disappears when you push the shifter within that "zone" forward about 1mm.

This tells me that something along the cable line is contacting a vibrating surface when in 4th.
I just tested this out this morning.
The vibrating surface is the transmission/drive train. The cables are supposed to have enough slack to isolate that like how they are in all other gears. The reason why 4th gear vibrates is because the cable is in a position that it does not have enough slack in it.
Does the shifter assembly have a gate inside? I would imagine the fix is simply adding a plate so the shifter does not go back. I would imagine Perrin shifter stop should have already have such adjustment to keep the shifter from moving too far. But I guess they are only limiting side to side movement but not front to back.
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Old 12-11-2018, 01:41 PM   #42
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No, the shifter assy does not have a gate inside. Gates are in the transmission. Nor is there a place to put a gate without some fabbing. You'd also run into an issue clearing the shifter stops or interfering with reverse lockout.
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Old 12-11-2018, 03:11 PM   #43
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Quote:
Originally Posted by SirBrass View Post
No, the shifter assy does not have a gate inside. Gates are in the transmission. Nor is there a place to put a gate without some fabbing. You'd also run into an issue clearing the shifter stops or interfering with reverse lockout.
Kinda weird that the shifter would be in place with just cables without a gate in the assembly.
Anyways. I was thinking if there is some kind of metal or plastic plate would hold the shifter just about 1mm forward in 4th gear, it will do. See the silver plate. Because right now there is nothing there.
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Old 12-11-2018, 03:18 PM   #44
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That silver plate is the bracket for the 5/6 shifter stop and reverse lockout barrier.

You can feel the gates just fine with the setup as-is, especially with a properly adjusted perrin 1/2 shifter stop. I have the boomba short shifter w/ perrin shifter stop, and the gates are very detectable. I don't need a plate in the assembly that if it comes loose would keep me from going into the proper gear.
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Old 12-11-2018, 04:12 PM   #45
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Quote:
Originally Posted by SirBrass View Post
That silver plate is the bracket for the 5/6 shifter stop and reverse lockout barrier.

You can feel the gates just fine with the setup as-is, especially with a properly adjusted perrin 1/2 shifter stop. I have the boomba short shifter w/ perrin shifter stop, and the gates are very detectable. I don't need a plate in the assembly that if it comes loose would keep me from going into the proper gear.
I dont think the sloppiness of the 1st and 2nd gear drive me as crazy as the 4th gear vibration.
I wonder if I can just loosen the silver bracket and put a piece of plastic stopper there just a little wider than the silver bracket where the screw is to keep the shifter from moving back when the engine is underload.
Actually I don't even mind the vibration, it's this plastic silver ring above the reverse collar that is loose and buzzing when the shifter vibrates. I don't keep my hand on the shifter to notice the viberation but I do hear the buzzing from the loose silver ring. Maybe I need to fix that.

Last edited by jasonwrx86; 12-11-2018 at 04:17 PM.
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Old 12-20-2018, 01:24 PM   #46
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It is a known issue to Subaru, and they are working on a fix for it.
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Old 12-21-2018, 04:56 PM   #47
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I wonder why it takes them 4 years to fix it.
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Old 10-07-2019, 02:39 PM   #48
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My 2019 WRX has the 4th gear vibration/rattle.... loud enough to hear over the radio at normal volume. Only 22,000 miles and it's been doing it since about 8,000 miles. As of my last visit they didn't have a fix for it. Maybe safe to say that Subaru is not working on it.
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Old 12-15-2019, 11:29 PM   #49
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Interesting. I noticed my 19' WRX Premium vibrates in 4th as well. Not as bad as I've seen in a couple of videos, but it is noticeable :|
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Old 12-23-2019, 02:12 AM   #50
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I had the vibration in 4th and it got really bad at 10,000kms in my 2019 wrx.
Took it to dealer and they took out my transmission and took all kinds of measurements. They put it back in and told me they would contact me when there was a fix.
6 months later I got a call that the parts were in and it got fixed.
All vibration is gone in 4th. I think they said it was a shifting fork that was out of tolerance.
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