Transmission not shifting properly?

Tiny
SAMGREW
  • MEMBER
  • 1996 CHEVROLET LUMINA
  • 3.1L
  • V6
  • 2WD
  • AUTOMATIC
  • 185,000 MILES
Car made sound like fan blades hitting something while accelerating. Very slowly picked up speed but will not shift gears unless I let off accelerator.
Monday, April 7th, 2025 AT 8:30 PM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 51,023 POSTS
Can you please shoot a quick video with your phone so I can hear the noise? That way I can tell for sure what's going on. You can upload it here with your response. We need to hear the noise, so we know which direction to go to help you fix the car. It takes time to upload so please be patient.
Was this
answer
helpful?
Yes
No
Tuesday, April 8th, 2025 AT 10:51 AM
Tiny
SAMGREW
  • MEMBER
  • 53 POSTS
Since I changed the fluid and filtered it no longer makes the noise. It accelerates very slowly and will not shift without letting off accelerator.
Was this
answer
helpful?
Yes
No
Wednesday, April 9th, 2025 AT 12:14 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 51,023 POSTS
This can happen because of a clogged catalytic converter. Do you have any trouble codes?

Please go over these guides to help us see what's going on:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

and

https://www.2carpros.com/articles/how-to-test-a-catalytic-converter

Please go over these guides and get back to us.
Was this
answer
helpful?
Yes
No
Friday, April 11th, 2025 AT 9:07 AM

Please login or register to post a reply.

Related Transmission Not Shifting Content

VIEW MORE