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Old 07-02-2011, 10:17 PM   #1
fitzsicn
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Default Vibrating/rattling gear shift 06 NA impreza

Hello all. Firstly, this is my first forum post so be gentle I have an 06 NA 2.5i impreza MT sedan. Recently I have been getting a vibrating/rattling in my shifter. The rattling happens in 2nd or 3rd gear when the engine is under load around 4k RPMs. I have done some searching and found some posts talking about replacement shifters, short throws and the like with solutions, but I have checked those cases and they don't seem to be my problem. I drove home today with my shifter and boot off so I could see and feel what's happening. It really feels like the vibrations and rattling are originating from the bottom of the shifter (not interior to the vehicle). Anyone else have similar issues? Thanks in advance for any help.

As a side note... this is my first subaru and I love it. I'm already trying to plan on how I'm going to upgrade to a WRX in the future
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Old 07-02-2011, 10:22 PM   #2
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yup. I have it too. It is a common noise with the 06 (and some other years from what I have heard). I was trying to address it myself for a while but gave up when I realized that it is in the linkage that goes into the tranny. I would like to address it at some point but I have kinda given up on it after hearing over and over from guys on here that it isn't causing damage. Just a Subaru quirk...

Not sure if that's the answer you want, but it's all I've got for you
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Old 07-02-2011, 10:25 PM   #3
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Haha, the answer I was worried about! It seemed like it was originating from somewhere deep down that would be hard to get to. Thanks for the help.
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Old 07-06-2011, 01:25 AM   #4
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Just start saving for a 6 speed swap.
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Old 07-06-2011, 02:38 AM   #5
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1) Make sure the bolt through the shift lever is tight. This can be accessed from inside the car by lifting up the shift boot and trim.

2) Make sure the two bolts going through the linkage u-joint are tight. These are underneath the car, left side of the transmission, up high.

3) Make sure the front of shifter stay bolt is tight. This is a little lower than where you found the u-joint.

4) Make sure the rear of shifter stay bolts are tight. These are (obviously) at the other end of the shifter stay, above the driveshaft.

Any rattle after that is internal to the tranny.
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Old 07-06-2011, 08:37 AM   #6
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I checked the bolt on the shift lever the other day and it was fine. I plan on replacing the tranny fluid soon, so when I am under the car then I'll check out those other linkages and bolts. Thanks for the info!
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Old 07-06-2011, 12:22 PM   #7
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it's the shifter itself in the pivot ball/cup at the base... you need to grease it. Use something heavier than whatever the factory put in...

Mine used to do it all the time, but oddly enough, it doesn't anymore... maybe the resonance was canceled out by introduction of other NVH I added from everything else I've done to the car.
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Old 07-06-2011, 02:21 PM   #8
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Quote:
Originally Posted by williaty View Post
1) Make sure the bolt through the shift lever is tight. This can be accessed from inside the car by lifting up the shift boot and trim.

2) Make sure the two bolts going through the linkage u-joint are tight. These are underneath the car, left side of the transmission, up high.

3) Make sure the front of shifter stay bolt is tight. This is a little lower than where you found the u-joint.

4) Make sure the rear of shifter stay bolts are tight. These are (obviously) at the other end of the shifter stay, above the driveshaft.

Any rattle after that is internal to the tranny.
Great tips! My 2006 NA (68k miles) has a lot of shifter rattles and I have yet to attemp to fix it. This will give me a good place to start.
I hope it isn't internal to the tranny
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Old 07-06-2011, 02:22 PM   #9
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Quote:
Originally Posted by Sir-Knight View Post
it's the shifter itself in the pivot ball/cup at the base... you need to grease it. Use something heavier than whatever the factory put in...

Mine used to do it all the time, but oddly enough, it doesn't anymore... maybe the resonance was canceled out by introduction of other NVH I added from everything else I've done to the car.
Can this be accessed from inside the car with the boot removed?
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Old 07-06-2011, 03:51 PM   #10
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Quote:
Originally Posted by JohnM10 View Post
Can this be accessed from inside the car with the boot removed?
Yes, it can. However, it's a VERY different sound. If the rattling is metallic sounding, it's not the cup. If the rattling is plastic sounding, it's probably the cup.
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Old 07-06-2011, 05:24 PM   #11
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I've had this problem for over 4 years. So today I decided to take apart the boot, pop off the shifter and stuff a ton of lithium grease in the pivot hole. After putting it all back together I took it for a test drive.

For a few miles the rattling seemed to subside slowly... But now it's gone.
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Old 07-06-2011, 06:32 PM   #12
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Sounds like it may be worth a try... thanks!
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Old 07-08-2011, 04:16 AM   #13
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i have the same problem on my 06 obs and put sti motor mounts in and that helped it out but i know i need to replace my tranny mount and shifter bushings to get rid of everything.
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Old 07-08-2011, 08:28 PM   #14
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Quote:
Originally Posted by f4umt View Post
i have the same problem on my 06 obs and put sti motor mounts in and that helped it out but i know i need to replace my tranny mount and shifter bushings to get rid of everything.

What kind of difference did the mounts make for you? Not only do I have the OP Rattle, but I think Subaru was short on Mounts when they made my car and put the engine in a rubber Hammock instead.
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Old 07-09-2011, 12:27 AM   #15
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STi motor mounts are not an upgrade from stock 2.5rs/2.5i mounts. New mounts are an upgrade for old mounts, though.
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Old 07-09-2011, 12:30 AM   #16
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To finish the clarification, the STi Group N motor mounts are the ones that are a real upgrade since they use harder rubber.
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Old 07-09-2011, 11:01 AM   #17
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Quote:
Originally Posted by williaty View Post
Yes, it can. However, it's a VERY different sound. If the rattling is metallic sounding, it's not the cup. If the rattling is plastic sounding, it's probably the cup.
sure but it's the easiest one to eliminate before you start spending money.
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Old 07-25-2011, 05:51 PM   #18
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I never had a rattle before in my 05' STi shfter rod until I started to upgrade the bushings, At first I only had the kartboy front bushing... which has been on the car for 5 years now.

I just recently did the TIC, linkage, pivot, and kartboys rear shifter stay.

Now I have the SAME exact thing as you had... At first I was getting a slight rattle in all gears... So I took the shift boot off and tighten the pivot bolts... sorta went away but it was always at a certain rpm range from say 2k-4.5k and it would do it in 1-4 gears.

I got up under the car last night and tighten the bolt that is at the one shifterlinkage the one that you can actually see... so I tighten that one... now I only get rattling from 3500rpm-4200rpms in 3rd gear.

If I put my hand on the OEM subaru Ti knob it goes away. If I hold the base it goes away...

I know it's NOT the reverse lock out cable beause that's dead square in the middle of the shifter shaft, and it has lithiom grease in there as recommend by someone to dampen the sound.. (it didn't work)

I checked the reverse lock out cable and it's not hitting the drive shaft at all, not even close, it's tight and there is nothing hittting it or it hitting anything else...

I really don't want to tap out the pins again and pull the whole shifter assembly out again because that was a pain in the ass but I'm thinking it's the stiffer linkage bushings....

It's the type of annoying rattle that seriously is driving me nuts..

Any ideas?

I torqed everything to spec and short of me removing the entire assebly to get to the one bolt on the linkage that I can't from under the car I would just tighten it up more so that what it's already properly torqed too...

-Nigel
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Old 07-25-2011, 06:04 PM   #19
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My thought, given chasing this through several cars, is that, if you've carefully eliminated all the possible sources of rattle in the lever, linkage, and stay, there's something loose internal to the transmission. With the stock soft bushings, they absorb all the rattle so you never know. When you get hard bushings in there, they don't absorb the vibration anymore, so you finally know there's a rattle.
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Old 08-23-2011, 10:23 AM   #20
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Ok so I narrowed down the probem.

Was driving today in 3rd gear (sure people behind me loved it..lol) and took my shifter knob off, at which point at 3500 rpms the rattle is nuts..

I put my finger on the shifter lever and felt where the vibration was coming,, it's DEFINITELY coming from the reverse lock out RING itself. I checked the lock out cable weeks ago and it's directly in the center of the shaft, so the actual rattle is the reverse lock out piece that i can wiggle a little bit or move to the left and right and it makes a click...

so now at this point, how is this fixed?

Thanks,
-Nigel
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Old 08-29-2011, 10:30 AM   #21
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Ok well, thought I would update as it migh thelp someone. I narrowed the problem down to the actual lock out reverse ring. I could tap it back and forth and hear a little rattle noise. Note this was not the cable inside the shifter rather the actual part that you LIFT up to put it in reverse. I took ou the ENTIRE shifter linkage last night.

I made sure eveything was tight.. even gave stuff a little 1/4 turn even though I knew it was TIGHT /torqed already.

Took apart the top of the shifter by tapping out hte reverse lock out pin, take the lock out ring off and unscrewing the silver piece. Gave a look a noticed that there was some play between the insert and the lock out ring.. I guess after 5 years the little plastic piece gets worn a little... I put one piece of electrical tape there along with some bushing grease. Put EVERYHING back together, put it back in the car, bolted everything back..etc.

Took it for a ride today to work and was dreading 3'rd gear at 3200rpm-4000rpm... To my surprise there is no god damn rattle anymore. I can tap and hit the lock out ring and there is no play in it anymore... perhaps it just needed to be taken apart and messed with?? I don't know, I don't care I am just glad I fixed it, it was getting to the point where I was going to sell the damn car that's how much it drove me nuts..

All is well with the suby and I am now happy again..lol

I know it doesn't really apply to the NA version but perhaps somehwere in the linkage it is not as tight as it should be.

-Nigel
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