2001 Buick LeSabre Q&A

2001 Buick LeSabre Question: Tranny rattles. But when I accelerate it stops. It only does this when stop/go.

My 01 Buick lesabre has a rattling noise coming from underneath it. I had the tranny fluid and filter changed what could be the cause of the rattling sound? -
Answer 1
Most likely broken/loose catalyst inside the converter! (Catalytic converter) Or loose exhaust heat shield. -
Comment 1
Thank you so much -
Answer 2
agree with #1 or poss cracked flex plate -
Comment 1
Thanks you guys were helpful. -