Excessive Tire Noise

Go350zGo · 07-06-2009, 10:01 PM

car: 2005 Sti- completely stock

ever since i got my car back from service my tires screech and chirp during normal driving at normal speeds. turning is ridiculous and i dont understand why it keeps happening. even when going straight if there is uneven road the tires can chirp while going over it. the dealer supposedly replaced a part in my rack & pinion that was leaking (or replaced the whole thing, im not sure) but besides that i have no other leads. i am planning to take it back to the dealer, but i dont have a specific part to blame. could it be my differential?

thanks to anyone who can help

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Web Foot STi · 07-06-2009, 10:19 PM

It could be your alignment. How are your tyres wearing? If they changed out the rack, or disassembled it for the component replacement, they would have to set the toe.

Don't settle for a "Green" alignment. You want. 0*00" toe.

Uncle Scotty · 07-06-2009, 10:33 PM

good god....they screwed the pooch somewhere

drivin blind · 07-07-2009, 09:56 AM

Don't settle for a "Green" alignment. You want. 0*00" toe.[/quote]

School me. What's a green alignment? Will 0 toe reduce tire wear? RP

Web Foot STi · 07-07-2009, 11:45 AM

Zero toe will help with tyre wear.

Like any specification there is a tolerance range. On an alignment rack the tech can move things around until the needle is in the green. (Now it's a GUI, but you get the idea.) For the street Dead Nuts 0 toe is a good compromise. It is also in the middle of the spec.

For camber, even if you only take freeway ramps hard you want max negative camber up front. If you can get into the red negative, out of spec, so much the better.

Uncle Scotty · 07-07-2009, 01:51 PM

d00000000000000ds

this sounds like they ROYALLY SCREWED THR POOCH somewhere....not just a bad alignment

Go350zGo · 07-07-2009, 02:06 PM

ya, i gotta agree with scotty, i dont think its my alignment i think its something way more serious

its possible that something is wrong with the AWD system

Web Foot STi · 07-07-2009, 02:27 PM

No question that the dealer screwed the pooch. The question is where? An alignment check is an easy place to start.

Yes, a locked differential will make the tyres protest. The tyres chirp and the car will shudder as they fight each other. I'm just not sure how they buggered up a diff, or diffs.

Way back I had a welded rear end and know exactly what those symptoms are. Massive understeer too.

OP: Have you played with the DCCD switch and dial?

Edit: Just remembered the Steering Angle Sensor. If they R&R the rack and didn't get this right it could be confusing the heck out of the DCCD:

http://forums.nasioc.com/forums/show...g+angle+sensor

Could they have miss stabbed the rack and rather than do it right just re centered the wheel on the shaft? The DCCD would think you are in a constant corner going straight...

Go350zGo · 07-07-2009, 09:04 PM

web foot, thank you very much for you input and im going to use your ideas when i get mad at the dealer for WTF they did to my car and how fast they are going to fix it lol

i have never changed my DCCD(ive left it on auto since i got the car) settings but i would agree that that is probably the best lead. i really think whoever was working on it at the dealer probably did what you said and adjusted the rack in a way that was ignorant of the dccd

Web Foot STi · 07-07-2009, 09:28 PM

Might want to put the DCCD in manual and try full forwards and full back on the dial and see if that changes the feel of things.

Another way to disable the DCCD is to pull up on the parking brake. Do not engage the brake shoes, but leave it up just short of that point and drive around the block and see if things are better.

Good luck.

Uncle Scotty · 07-07-2009, 10:06 PM

another thing is that if the fluid was changed with the wrong stuff....that may do that too

07-06-2009, 10:01 PM	#1
Go350zGo Scooby Specialist Member#: 197154 Join Date: Dec 2008	Excessive Tire Noise car: 2005 Sti- completely stock ever since i got my car back from service my tires screech and chirp during normal driving at normal speeds. turning is ridiculous and i dont understand why it keeps happening. even when going straight if there is uneven road the tires can chirp while going over it. the dealer supposedly replaced a part in my rack & pinion that was leaking (or replaced the whole thing, im not sure) but besides that i have no other leads. i am planning to take it back to the dealer, but i dont have a specific part to blame. could it be my differential? thanks to anyone who can help * Registered users of the site do not see these ads.

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07-06-2009, 10:19 PM	#2
Web Foot STi Scooby Guru Member#: 39086 Join Date: Jun 2003 Chapter/Region: NWIC Location: Portland, OR Vehicle: 2004 STi White	It could be your alignment. How are your tyres wearing? If they changed out the rack, or disassembled it for the component replacement, they would have to set the toe. Don't settle for a "Green" alignment. You want. 0*00" toe.

07-06-2009, 10:33 PM	#3
Uncle Scotty NASIOC Supporter Member#: 16200 Join Date: Mar 2002 Vehicle: OK Houston we have an Uncle	good god....they screwed the pooch somewhere

07-07-2009, 09:56 AM	#4
drivin blind Scooby Specialist Member#: 73043 Join Date: Oct 2004 Chapter/Region: MWSOC Location: Carson City, Michigan Vehicle: 2011 STI/2010 370Z Black/Black Cherry	Don't settle for a "Green" alignment. You want. 0*00" toe.[/quote] School me. What's a green alignment? Will 0 toe reduce tire wear? RP

07-07-2009, 11:45 AM	#5
Web Foot STi Scooby Guru Member#: 39086 Join Date: Jun 2003 Chapter/Region: NWIC Location: Portland, OR Vehicle: 2004 STi White	Zero toe will help with tyre wear. Like any specification there is a tolerance range. On an alignment rack the tech can move things around until the needle is in the green. (Now it's a GUI, but you get the idea.) For the street Dead Nuts 0 toe is a good compromise. It is also in the middle of the spec. For camber, even if you only take freeway ramps hard you want max negative camber up front. If you can get into the red negative, out of spec, so much the better.

07-07-2009, 01:51 PM	#6
Uncle Scotty NASIOC Supporter Member#: 16200 Join Date: Mar 2002 Vehicle: OK Houston we have an Uncle	d00000000000000ds this sounds like they ROYALLY SCREWED THR POOCH somewhere....not just a bad alignment

07-07-2009, 02:06 PM	#7
Go350zGo Scooby Specialist Member#: 197154 Join Date: Dec 2008	ya, i gotta agree with scotty, i dont think its my alignment i think its something way more serious its possible that something is wrong with the AWD system

07-07-2009, 02:27 PM	#8
Web Foot STi Scooby Guru Member#: 39086 Join Date: Jun 2003 Chapter/Region: NWIC Location: Portland, OR Vehicle: 2004 STi White	No question that the dealer screwed the pooch. The question is where? An alignment check is an easy place to start. Yes, a locked differential will make the tyres protest. The tyres chirp and the car will shudder as they fight each other. I'm just not sure how they buggered up a diff, or diffs. Way back I had a welded rear end and know exactly what those symptoms are. Massive understeer too. OP: Have you played with the DCCD switch and dial? Edit: Just remembered the Steering Angle Sensor. If they R&R the rack and didn't get this right it could be confusing the heck out of the DCCD: http://forums.nasioc.com/forums/show...g+angle+sensor Could they have miss stabbed the rack and rather than do it right just re centered the wheel on the shaft? The DCCD would think you are in a constant corner going straight...

07-07-2009, 09:04 PM	#9
Go350zGo Scooby Specialist Member#: 197154 Join Date: Dec 2008	web foot, thank you very much for you input and im going to use your ideas when i get mad at the dealer for WTF they did to my car and how fast they are going to fix it lol i have never changed my DCCD(ive left it on auto since i got the car) settings but i would agree that that is probably the best lead. i really think whoever was working on it at the dealer probably did what you said and adjusted the rack in a way that was ignorant of the dccd

07-07-2009, 09:28 PM	#10
Web Foot STi Scooby Guru Member#: 39086 Join Date: Jun 2003 Chapter/Region: NWIC Location: Portland, OR Vehicle: 2004 STi White	Might want to put the DCCD in manual and try full forwards and full back on the dial and see if that changes the feel of things. Another way to disable the DCCD is to pull up on the parking brake. Do not engage the brake shoes, but leave it up just short of that point and drive around the block and see if things are better. Good luck.

07-07-2009, 10:06 PM	#11
Uncle Scotty NASIOC Supporter Member#: 16200 Join Date: Mar 2002 Vehicle: OK Houston we have an Uncle	another thing is that if the fluid was changed with the wrong stuff....that may do that too