THUD noise coming from rear end when shifting

2005 CADILLAC STS
99,000 MILES • 6 CYL • FWD • AUTOMATIC
Avatar
JOHN WILLIAMS2
  • MEMBER
  • 2 POSTS
I have a thud noise that sounds like it is coming from the rear end when shifting from park to drive or park to reverse or from neutral to reverse or drive or when it is downshifting as well sometimes.It has been doing this for a few years and has stayed about the same possible has gotten slightly worse. What do you think it is?
Jun 7, 2016 at 4:20 PM
Advertisement
Avatar
HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
check your rubber joints on driveshaft? They may be wearing causing the noise. also can give a vibration at about 55 and goes away kind of like a tire. the part is called a coupler there is one on each end.
Image (Click to enlarge)
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Jun 8, 2016 at 9:39 AM
Avatar
JOHN WILLIAMS2
  • MEMBER
  • 2 POSTS
I will check them and let you know, thanks!
Jun 8, 2016 at 12:51 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.