Tech / General Engine Is your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!

Replaced Flexplate a Few Months Ago. Hearing Flexplate Noise and Popping Sound.

Thread Tools
 
Search this Thread
 
Old 11-17-2020, 03:09 PM
  #1  
Senior Member

Thread Starter
 
Vinscully50's Avatar
 
Join Date: May 2013
Posts: 559
Received 15 Likes on 13 Posts
Car: 1986 Camaro IROC Z
Engine: LB9 305 TPI
Transmission: 700R4
Replaced Flexplate a Few Months Ago. Hearing Flexplate Noise and Popping Sound.

A few months ago my original flexplate began making the infamous squealing noise. Usually only at lower speeds. I had a shop I trust replace it, since it's kind of a PITA. Anyway last week my car began making the flexplate noise again. Also when driving sometimes at low speeds (typically 20-40 mph) I hear this popping sound coming from under the car. It sounds like it's coming from the rear of the engine. Could this also be from the flex plate? The noise sounds kind of like when your drive over a basketball and it pops rather than a misfire.
Old 11-17-2020, 05:23 PM
  #2  
Supreme Member

iTrader: (2)
 
Tootie Pang's Avatar
 
Join Date: Aug 2009
Location: Los Angeles
Posts: 1,972
Received 124 Likes on 91 Posts
Car: 1989 IROC Convertible
Engine: 350 TPI L98
Transmission: WC T5
Axle/Gears: 3.42
Re: Replaced Flexplate a Few Months Ago. Hearing Flexplate Noise and Popping Sound.

Is the sound affected by what gear you are in at those speeds (20-40) ?
Old 11-17-2020, 07:25 PM
  #3  
Senior Member

Thread Starter
 
Vinscully50's Avatar
 
Join Date: May 2013
Posts: 559
Received 15 Likes on 13 Posts
Car: 1986 Camaro IROC Z
Engine: LB9 305 TPI
Transmission: 700R4
Re: Replaced Flexplate a Few Months Ago. Hearing Flexplate Noise and Popping Sound.

Originally Posted by Tootie Pang
Is the sound affected by what gear you are in at those speeds (20-40) ?
I'm not sure honestly. It doesn't even happen all of the time either, which makes it tough to try and listen for. It's kind of like that Warner Bros frog. When you want to do it, it doesn't...
What lines along are you thinking of regarding gears?
Old 11-18-2020, 03:08 PM
  #4  
Supreme Member

iTrader: (2)
 
Tootie Pang's Avatar
 
Join Date: Aug 2009
Location: Los Angeles
Posts: 1,972
Received 124 Likes on 91 Posts
Car: 1989 IROC Convertible
Engine: 350 TPI L98
Transmission: WC T5
Axle/Gears: 3.42
Re: Replaced Flexplate a Few Months Ago. Hearing Flexplate Noise and Popping Sound.

I'd check on things rattling under there. Exhaust pipes, heat shields, etc...

I was starting to isolate which end of the car. Engine and trans are dependent on gear/rpm. Drivershaft, axle, etc are only road speed.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
tomtom420
Transmissions and Drivetrain
5
07-30-2010 11:52 PM
TraviZ
Northern California
16
08-08-2006 01:44 AM
matt formula
Tech / General Engine
5
07-08-2004 02:32 AM
gilley's86
Tech / General Engine
1
06-21-2003 11:37 PM



Quick Reply: Replaced Flexplate a Few Months Ago. Hearing Flexplate Noise and Popping Sound.



All times are GMT -5. The time now is 08:38 AM.