Transmission issue???
Thread Starter
Instructor
Joined: Jul 2004
Posts: 159
Likes: 0
From: Northern VA
Transmission issue???
I have a 2003 Z06 and when it sits at idle there is a knocking sound from the transmission. It is noticeable when standing in front and on the side of the car. I have no issues shifting and don't think it is in the engine. I checked all of the fluids and everything is at the correct levels. Any ideas? Should I be concerned or am i being paranoid? It only has 28,xxx on it.
Le Mans Master
Joined: Dec 2000
Posts: 5,245
Likes: 25
From: Blue Ridge Georgia
Any knocking sound would freak me out. It's always cheaper to fix before it totally breaks. I would re-create the sound and then find out exactly where it is coming from. A failure at highway speed could be dangreous.
Racer
Joined: Jun 2010
Posts: 457
Likes: 0
From: LaGrange Ga
What makes you think it is coming from the transmission? Have you pushed the clutch in to see if the sound goes away?
The valvetrains on our cars are a bit loud and that my be the sound you are hearing. Also the torque tube makes a serious clunk when shutting off. As compared to my Accord
The valvetrains on our cars are a bit loud and that my be the sound you are hearing. Also the torque tube makes a serious clunk when shutting off. As compared to my Accord
Tech Contributor
Joined: Jan 2007
Posts: 19,453
Likes: 1,160
From: Dyer, IN
I have a 2003 Z06 and when it sits at idle there is a knocking sound from the transmission. It is noticeable when standing in front and on the side of the car. I have no issues shifting and don't think it is in the engine. I checked all of the fluids and everything is at the correct levels. Any ideas? Should I be concerned or am i being paranoid? It only has 28,xxx on it.
Le Mans Master
Joined: Oct 2000
Posts: 6,362
Likes: 30
From: Oak Harbor WA
Fluids being low rarely if ever make a knocking sound go away. By that time it is too late. The stock clutch on the Z is a bit noisy and more of a rattle. The fuel injectors are noisy to the point of sounding like a sewing machine.
Get car on a lift and get under there for a looksee. Could be a loose part, could be nothing at all.
Get car on a lift and get under there for a looksee. Could be a loose part, could be nothing at all.
Drifting
Joined: Oct 2004
Posts: 1,281
Likes: 21
From: Orlando Florida
What makes you think it is coming from the transmission? Have you pushed the clutch in to see if the sound goes away?
The valvetrains on our cars are a bit loud and that my be the sound you are hearing. Also the torque tube makes a serious clunk when shutting off. As compared to my Accord
The valvetrains on our cars are a bit loud and that my be the sound you are hearing. Also the torque tube makes a serious clunk when shutting off. As compared to my Accord
To the OP, if it's a rattling type of sound that goes away when the clutch pedal is pushed in, it's the throw out bearing.
