Author Topic: 1969 Cadillac Deville Convertible- Chirping Noise from Rear of Vehicle  (Read 162 times)

Offline mirrione3

  • Posts: 15
  • Name: D Mirrione
Hello friends,

I have a 1969 Deville Convertible that is making a chirping sound from either the middle or the rear of the underside of the car. When I drive with the top down, I can open the door slightly and it sounds like it is just behind me. The sound is like a chirp that moves along with the speed of the car.

It typically appears when:

  • Driving for about 10-15 minutes
  • Occurs about 75% of the time
  • Becomes noticeable on deceleration
  • Does not change if brakes are used or not
  • Does it whether AC system is on or off
  • Will make noise on acceleration after it first starts on deceleration
  • It may be doing it at higher speeds but I can't hear it over the road noise

Any guidance on where to troubleshoot would be great. I am thinking it may be the CV Joint but I am still learning and could be way off base. Other then the noise, the car runs great and you cannot feel any difference when the noise is being made or not. Also, I have changed the differential fluid and it made no difference.

Thank you all for the help!

-Dave
1969 Cadillac Deville Convertible

Offline Dave Shepherd

  • Posts: 1922
Re: 1969 Cadillac Deville Convertible- Chirping Noise from Rear of Vehicle
« Reply #1 on: November 06, 2017, 02:25:58 PM »
This is a tough diagnosis from here, in my shop I would get the rear wheels off the ground and try and duplicate the noise, safely of course.  May be a u joint, cardan joint.

Offline WTL

  • Posts: 92
  • Name: W. Love
Re: 1969 Cadillac Deville Convertible- Chirping Noise from Rear of Vehicle
« Reply #2 on: November 06, 2017, 02:44:40 PM »
There was recently another post where a member heard chirping, I suggested the CV joint but he later reported back and said it was something else.  May ought to search for that post. 

I replaced my drive shaft in july because of bad chirping.  At the very least it could be your drive shaft.  Dave's suggestion should probably help you nail down what the chirping is not from, if it's not a specific wheel then probably that rear joint.

Offline P. Manoogian

  • CLC #29766
  • Posts: 212
  • Name: P.Manoogian
Re: 1969 Cadillac Deville Convertible- Chirping Noise from Rear of Vehicle
« Reply #3 on: November 15, 2017, 07:29:24 PM »
Driveshaft issue.
1961 Eldorado - Shell Pearl/Mauve
1959 Coupe DeVille - Vegas Turquoise
2012 CTS Coupe- Crystal Red
1970 AMX

Offline Bill Young

  • Nothin's Lackin When Your Cadillac'n
  • Posts: 489
    • CLC Member
      CLC Member #17476
  • Name: William W. Young
Re: 1969 Cadillac Deville Convertible- Chirping Noise from Rear of Vehicle
« Reply #4 on: November 15, 2017, 09:45:17 PM »
I had a similar problem on a 1968 DeVille Convertible in 1974. It was a rear wheel axle bearing.
1972 Cadillac Fleetwood Eldorado Convertible in Coronation Red , White top , White seats with Oxblood dash and carpet

Offline mirrione3

  • Posts: 15
  • Name: D Mirrione
Re: 1969 Cadillac Deville Convertible- Chirping Noise from Rear of Vehicle
« Reply #5 on: November 16, 2017, 12:31:32 AM »
I had a similar problem on a 1968 DeVille Convertible in 1974. It was a rear wheel axle bearing.

Thanks Bill! I'll give it a look.
1969 Cadillac Deville Convertible