Really odd noise when first accelerating - drivetrain possibly? (with video)
#1
Three Wheelin'
Thread Starter
Really odd noise when first accelerating - drivetrain possibly? (with video)
Hey all,
I've started noticing really peculiar noise on my 4S tiptronic. When the car is first started and you give it a bit of gas to roll forward, I hear what I can best describe as a bike spoke clacker noise (3 metalish on plastic sounding clicks) coming from the front, somewhat leftish area of the car.
This happens only once and I cannot recreate it again until I turn the car off. Also the noise doesn't appear until I give it a bit of gas in drive (drivetrain moves quicker than idle); it will not appear if I'm creeping around while covering the brakes. I can recreate it every time by just turning the car on and off and then rolling forward with gas.
At 3 seconds you can hear it. Almost sounds like someone sticking something into spinning fan blades.
I've started noticing really peculiar noise on my 4S tiptronic. When the car is first started and you give it a bit of gas to roll forward, I hear what I can best describe as a bike spoke clacker noise (3 metalish on plastic sounding clicks) coming from the front, somewhat leftish area of the car.
This happens only once and I cannot recreate it again until I turn the car off. Also the noise doesn't appear until I give it a bit of gas in drive (drivetrain moves quicker than idle); it will not appear if I'm creeping around while covering the brakes. I can recreate it every time by just turning the car on and off and then rolling forward with gas.
At 3 seconds you can hear it. Almost sounds like someone sticking something into spinning fan blades.
Last edited by halik; 12-13-2012 at 02:18 AM.
#4
If it sounds like something is hitting something or a thud you can sense try checking the transmission mounts. Also it appears you are putting it in gear and hitting the gas right after. Does it do the noise when you let it go from automatic 1st up to 2nd where it defaults to then hit the gas? Does it make the noise when in manual 1st or 2nd accelerating from a stop? Does it do it at all when not first putting the car into gear?
#5
Drifting
Join Date: Sep 2011
Location: Ephrata, PA, USA now. Originally from the UK
Posts: 3,075
Likes: 0
Received 22 Likes
on
17 Posts
it will not appear if I'm creeping around while covering the brakes.
Dont start it in Drive then. Is it wise to start a tiptronic in drive or any car for that matter and why? I mean can they be started in neutral? I have never driven a tiptronic so I am only asking. Main reason I am asking is a normal automatic car will not start in gear. It has to be in Auto for a particular reason. So the car does not move forward if the gas pedal is depressed on start up. Maybe the CLUNK is trying to tell you something. Like complaining about something being done wrong by the driver. Does your manual say anything about starting the car up when the drive is engaged?
Dont start it in Drive then. Is it wise to start a tiptronic in drive or any car for that matter and why? I mean can they be started in neutral? I have never driven a tiptronic so I am only asking. Main reason I am asking is a normal automatic car will not start in gear. It has to be in Auto for a particular reason. So the car does not move forward if the gas pedal is depressed on start up. Maybe the CLUNK is trying to tell you something. Like complaining about something being done wrong by the driver. Does your manual say anything about starting the car up when the drive is engaged?
#6
Three Wheelin'
Thread Starter
Bit of clarification: I'm not starting the car while it's in drive, it's only that once it's started and I put it in drive it will make the sound once. To recreate the sound, I have to turn off and then restart the car.
The thud you hear in the first second or so me putting the car in drive.
The thud you hear in the first second or so me putting the car in drive.
#7
Three Wheelin'
Thread Starter
If it sounds like something is hitting something or a thud you can sense try checking the transmission mount up Also it appears you are putting it in gear and hitting the gas right after. Does it do the noise when you let it go from automatic 1st up to 2nd where it defaults to then hit the gas? Does it make the noise when in manual 1st or 2nd accelerating from a stop? Does it do it at all when not first putting the car into gear?
I suspect it's a clearance issue maybe due to bad trans amount or something - it appears to coincide with the drive shaft spinning up when the car is first turned on.
Trending Topics
#8
Three Wheelin'
Thread Starter
#9
Rennlist Member
Front drive shaft flex disk bad?
Driveshaft flex disc - C4 and Turbo
These folks list the OEM Porsche replacement for under $100. Porsche only sells the whole driveshaft for many $$$.
KO Performance in Florida
http://www.koperformance.com/
Part #: 102539005-57
KO Price: $74.61
Shipping: $0.00 - FREE Shipping! - & *Ship Group
Stock Status: In Stock - Ready to Ship!
----------------------------------------------------------------------------------------
Book #: 10 2539 005
Description: Driveshaft Flex Disc
Applications: Carrera 4 99 thru 05
Manufacturer: O.E.M.
__________________
Driveshaft flex disc - C4 and Turbo
These folks list the OEM Porsche replacement for under $100. Porsche only sells the whole driveshaft for many $$$.
KO Performance in Florida
http://www.koperformance.com/
Part #: 102539005-57
KO Price: $74.61
Shipping: $0.00 - FREE Shipping! - & *Ship Group
Stock Status: In Stock - Ready to Ship!
----------------------------------------------------------------------------------------
Book #: 10 2539 005
Description: Driveshaft Flex Disc
Applications: Carrera 4 99 thru 05
Manufacturer: O.E.M.
__________________
#10
Three Wheelin'
Thread Starter
Front drive shaft flex disk bad?
Driveshaft flex disc - C4 and Turbo
These folks list the OEM Porsche replacement for under $100. Porsche only sells the whole driveshaft for many $$$.
KO Performance in Florida
http://www.koperformance.com/
Part #: 102539005-57
KO Price: $74.61
Shipping: $0.00 - FREE Shipping! - & *Ship Group
Stock Status: In Stock - Ready to Ship!
----------------------------------------------------------------------------------------
Book #: 10 2539 005
Description: Driveshaft Flex Disc
Applications: Carrera 4 99 thru 05
Manufacturer: O.E.M.
__________________
Driveshaft flex disc - C4 and Turbo
These folks list the OEM Porsche replacement for under $100. Porsche only sells the whole driveshaft for many $$$.
KO Performance in Florida
http://www.koperformance.com/
Part #: 102539005-57
KO Price: $74.61
Shipping: $0.00 - FREE Shipping! - & *Ship Group
Stock Status: In Stock - Ready to Ship!
----------------------------------------------------------------------------------------
Book #: 10 2539 005
Description: Driveshaft Flex Disc
Applications: Carrera 4 99 thru 05
Manufacturer: O.E.M.
__________________