Jump to content
Forums Gone... but not forgotten!
Pontiac of the Month

brandyv73's 1968 Firebird

2019 June
of the Month

  • Welcome!

    Welcome to Forever Pontiac, full of great ideas for Pontiac performance, maintenance, or for peer-to-peer assistance from Professional and DIY mechanics. Also, compete in our Pontiac monthly competitions. Please register if you'd like to take part.

  • 0
Sign in to follow this  
havoc1482

Possible cracked flywheel?

Question

Hey guys I have what I believe to be a THM200/C transmission.

When my car is a low speed or idling it makes a rattle noise that sounds like it is coming from the the area of the transmission/engine link. When I rev my engine it will go away, it is only there at low engine speeds/idle. I raised the idle speed and it stopped. My buddy says that it might be a cracked flywheel.

Comments? Suggestions?

Share this post


Link to post
Share on other sites

3 answers to this question

Recommended Posts

  • 0

Check your bellhousing bolts. Since they only require 30 or 40 lbs to tighten they do loosen off easily. If they are jack the engine and transmission up to realign then if needed and re torque the bolts. Your flywheel probably is not cracked and the noise is probably the flywheel flexing with the rotation of the motor. I have had this happen on two of my cars.

Share this post


Link to post
Share on other sites

Tired of these Ads? Register Today!

  • 0

now is the flywheel flexing a thing that I could fix myself or would I have to take it to a shop?

Share this post


Link to post
Share on other sites
  • 0

no because the once the bellhousing bolts are tight then it will re-align the torque converter to be parallel with the crank and keep the flywheel from flexing.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Answer this question...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  

Tired of these Ads? Purchase Enhanced Membership today to remove them!
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.