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Funky vibration/rumble

27K views 22 replies 9 participants last post by  VSurfn  
#1 ·
If I accelerate from a stop with the steering wheel turned I'm getting a rumble that I can feel through the wheel and gas pedal and it has a kinda deep throaty sound. This doesn't happen at all when the wheel is straight or even close to straight, only with the wheel turned a significant amount. In all of my old 4WD rigs this would happen if the front hubs were locked but that was expected, it was called chunking or something similar, but I've never experienced this with any of my Subarus. Has anyone else noticed this? It seems to be getting worse as the miles build, wasn't noticeable at all when new but after 11,500 miles it happens almost all the time now.
 
#2 ·
gravitylover said:
If I accelerate from a stop with the steering wheel turned I'm getting a rumble that I can feel through the wheel and gas pedal and it has a kinda deep throaty sound. This doesn't happen at all when the wheel is straight or even close to straight, only with the wheel turned a significant amount. In all of my old 4WD rigs this would happen if the front hubs were locked but that was expected, it was called chunking or something similar, but I've never experienced this with any of my Subarus. Has anyone else noticed this? It seems to be getting worse as the miles build, wasn't noticeable at all when new but after 11,500 miles it happens almost all the time now.
Someone else with my problem! I never posted it on the forum but I am actually taking my Crosstrek into Subaru tomorrow (Friday) morning for the exact same reason. I had it in before and told them about it and they said they drove it and didn't notice anything out of the ordinary, but I am taking it back tomorrow for a drive-along to make sure they know what I am talking about.

I will report back.
 
#4 ·
At Subaru now. I told them about the problem and they immediately said they've seen it before. We did a ride–along anyways to reproduce the vibration and were successful. They did a thorough check of the car, as well as test drove other new Subarus (where they got the same results) and they assured me it is a normal occurrence. I was told that it is just a natural resistance that can sometimes happen in full–lock with the new fully electronic power steering system in the Crosstrek.


Hopefully they are right, but at least I have it on record in case it turns into a bigger issue, but I am optimistic with their analysis.
 
#5 ·
Thank goodness condition was able to be reproduced at dealer....I have a growl/rattle that is only there occasionally- never at service dept. of course! I'd want to trust what the dealer is saying by nature but still keep a furrowed brow ??? just in case! Throw some of that "I'm the Crosstrek forum administrator" weight around if need be! Lol!
 
#6 ·
You know how you would never notice something until you have a direct connection with it, then "all of the sudden" you notice it everywhere? Well, that kind of happened with the rumbling issue I was having with the Crosstrek.

I was with some friends tonight for dinner and they wanted to go out to bars afterwards, but I am exhausted from last night so decided to go home. One of my friends is just in town visiting and she had rented a new (2012+) Impala for her time here. Since she had driven us to dinner, but didn't want to leave the car anywhere, I offered to drop them off at the bar and then take the car back and they could get a cab later.

None of that is important, just a long way of saying that I drove the Impala for a little bit tonight and got the EXACT same rumbling/vibration through the wheel/pedal as I do with my Crosstrek in full lock. It made me feel better knowing that it happens in other cars and must be something they haven't quite worked out with full-electric power steering.

On a side note, I HATED the Impala. Uncomfortable seats, confusing dash controls, cheap feeling, small, etc.
 
#8 ·
gravitylover said:
Well that helps make me feel better ;) It's weird though, I hadn't thought of it as a steering issue but more of a drivetrain thing. I'm making a list of things for Subaru to take a look at when I bring the car in for the second oil change in two or three weeks, this will be one of them.
Yes, definitely still ask them about it. If it ever turns up to be something bigger we will then have record of it early on.
 
#9 ·
I forgot to reply to part of the above, it's not only at full lock, this rumble or whatever happens with the wheel turned as little as 10% and anything other than the lightest throttle input.

Had the car in this morning and the "resolution" of the issue is - Transfer clutches. Apparently there is a clutch pack that redistributes power to the front wheels so they can spin at different speeds when they're turned. These clutches engage and disengage based on slip thus causing a vibration that you feel in the steering wheel and sometimes in the pedals. The service mgr. said this is usually more evident in the Outback but not unheard of in the Impreza with the cvt.

They also said the avg. mpg gauge can't be reprogrammed and that it is an estimate not an exact science. Implied was - Live with it... I know some people on other forums have had theirs reprogrammed, anybody know how? Part number or maybe there's a tech on here that can explain how to access it.
 
#10 ·
gravitylover said:
I forgot to reply to part of the above, it's not only at full lock, this rumble or whatever happens with the wheel turned as little as 10% and anything other than the lightest throttle input.

Had the car in this morning and the "resolution" of the issue is - Transfer clutches. Apparently there is a clutch pack that redistributes power to the front wheels so they can spin at different speeds when they're turned. These clutches engage and disengage based on slip thus causing a vibration that you feel in the steering wheel and sometimes in the pedals. The service mgr. said this is usually more evident in the Outback but not unheard of in the Impreza with the cvt.

They also said the avg. mpg gauge can't be reprogrammed and that it is an estimate not an exact science. Implied was - Live with it... I know some people on other forums have had theirs reprogrammed, anybody know how? Part number or maybe there's a tech on here that can explain how to access it.
Interesting...two different causes from two different dealers. At least both are saying it is a normal occurrence, but it's strange they are saying different reasons. My dealer did drive a brand new Crosstrek for comparison and got the same results, so I think it's ok.
 
#11 ·
I'm not sold on their reply. It really does seem to me that the rumble is getting worse, maybe I'm just more attuned to it but... I think I need to stop at another Subie dealer and have a tech take the car for a test ride and see what the answer is. I keep wondering if I should just fork over the $300 for a tranny fluid and filter flush and refill if that would solve the problem then try to figure out how to make Subaru pay.
 
#12 ·
Mine doesn't seem to be getting worse, if anything I notice it less. However, I am not quite sure if I believe them either. I am glad I am on record for reporting it early on so if it turns out to be something worse they will hopefully cover it.

Let us know if you do end up fixing it.
 
#14 ·
^^ So the rumble has been getting "worse." Now it does it with the wheel hardly turned at all, sometimes even when it's pointed straight and accelerating uphill from a stop. I've tried it a few times with the traction/spin control off and it doesn't do it at all. Time for the fourth oil change anyway so, off to the dealer it goes on Tuesday.
 
#16 ·
I've been having this same issue and began at around 10k miles. Started out when turning, now the vibration happens both when turning and straight. Sometimes it's really bad. It's so strange in that it is so sporadic-dry pavement, wet, snowy, bumpy roads and smooth. And it is not consistent, i'll go a day or two with it not happening at all, then will "flare up" again. Had the dealer look at it, of course could not reproduce the problem. Service writer had not heard of this before. Next step, I suppose, is to do a ride along but if others are being told it's normal, what is the point? This is driving me crazy! I love my Crosstrek (my 5th Subaru) but this is something I don't think I can get used to. This can't be normal. No car is perfect and there are imperfections I can accept but I don't know about this. So frustrated right now! Advice?
 
#19 ·
Went to dealer today to see what they could come up with for a diagnosis. Tech went for a ride, couldn't reproduce. Then went with the tech and couldn't reproduce either but he asked if I noticed it pulling to the right at all. I really didn't since I was so focused on the vibration. Turns out it was out of alignment and pretty significantly as well. So far, the vibration is gone or almost gone. Feel a little vibration but barely noticeable. The vibration is what I would consider "normal". Put about 40 miles on it today and it is much better. The alignment was covered under warranty (get the first one for free)

Since my last Subaru didn't need an alignment until about 75k, I never thought this could be causing or at least contributing to the issue. Hoping this takes care of the vibration.
 
#20 ·
Anyone think that these vibrations and alignment problem is why SOA issued this TSB?

2014 Subaru Xv Crosstrek structure body TSB (Bulletin TSB-05-57-14)

Bulletin Date: Feb. 20, 2014
Component: Structure body
Bulletin Summary: Subaru: a change has been made to the mounting bolts used for securing the front cross member to the vehicle body. The thickness of the flange at the base of the bolt's hex has increased to 5mm. Also included Subaru sti/brz model year 2014.
Vehicles covered in this TSB:
2014 Subaru Forester, 2014 Subaru Impreza, 2014 Subaru WRX, 2014 Subaru Xv Crosstrek
 
#21 ·
Woah, haven't been around the forum in a while. Hey folks!

I still have the rumble and it hasn't gotten any worse or even changed much at all since it started. Still frustrating as could be though.

About that TSB, I had the car at the dealer for an extremely overpriced 60k service and asked them to look into this and a few other things. According to them the bulletin doesn't exist it's all an internet fantasy and the transmission is a sealed and unserviceable unit. There is nothing they can do to alleviate the rattling in the front end at low speeds on rough pavement and you can't flush and refill the transmission ever.

After 60,000 miles this car has more rattles and clunks and a general loose sloppy feeling than I can count. This is my fourth Subie and I expected more from it not less. Ahh well, 21st century decontenting at its finest ???
 
#22 ·
For these funky vibrations, rumble, ghost walks, and other strange front end things, as a test you might want to try putting 4 adults in the car or 200 pounds of sand bags in the cargo area. If the funky stuff stops then the rear wheel alignment toe in needs to be decreased (with no weight in the car). The decreased toe in should help a little but this cars design will never be as stable as you would like it to be for highway driving because of the ride height. This is more so for vehicle designs like jeeps with aftermarket lifts ("aka" Impreza with a lift ). A car/truck could get too much rear toe in as air (highway speed, wind, turning, exc.) pushes up the car body and the Subarus rear lateral link arm will change the rear wheel toe in to compensate for the rise in body height. The adjustment will set the toe in as if you had passengers in the car. Makes sense. This information comes from an alignment shop with over 50 years experience.

After hearing "feels like a normal Crosstrek" from a few Subaru dealer techs for the same vibrations/rumble you all are experiencing, I had my MY14 Crosstrek (12K miles) aligned today from an general alignment shop ($129 out of my pocket) and after driving it for 90 min car feels a lot better but there is still a slight trace of vibration/rumble as you all posted. I will post again after some more driving time.
 
#23 ·
gravitylover said:
Woah, haven't been around the forum in a while. Hey folks!

I still have the rumble and it hasn't gotten any worse or even changed much at all since it started. Still frustrating as could be though.

About that TSB, I had the car at the dealer for an extremely overpriced 60k service and asked them to look into this and a few other things. According to them the bulletin doesn't exist it's all an internet fantasy and the transmission is a sealed and unserviceable unit. There is nothing they can do to alleviate the rattling in the front end at low speeds on rough pavement and you can't flush and refill the transmission ever.

After 60,000 miles this car has more rattles and clunks and a general loose sloppy feeling than I can count. This is my fourth Subie and I expected more from it not less. Ahh well, 21st century decontenting at its finest ???
According to them the bulletin doesn't exist it's all an internet fantasy
The attached was sent to me by Subaru of America
 

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