After 2 new drive shafts, still can't determine source of vibration under the car. Vibration starts after take off at about 5 mph, then settles down at around 15 mph. Motor runs smoothly and transmission shifts smoothly. I hope someone has some ideas on a fix or what else to check. Thank you.
Thanks, Steven.
Here's another possibility-- I owned a '61 convertible with an odd vibration... turned out to be several broken flex plate "ears" (where the flexplate bolts on to the flywheel). Inspected from the bottom of the bell housing, a mechanic was able to weld over the cracks and cured the vibration. Hope this helps, James
I had a similar problem on my '62 Eldorado. The transmission mounts were the culprit.
Craig,
I had a vibration that really threw me for loop! Turned out to be the motor mount holes in my block of my 1955CDV. The motor mount holes were worn out of round so I reamed the block to the next size bolttrailer lake 001.JPG . All has been well since....good luck finding your vibration....walt...tulsa,ok
When I worked for GM starting in 62, NVH was almost a new focus when it came to problem diagnosis. The "old school" techs were not up to the task diagnosing these conditions. The Cadillac dealerships in the NYC area were handicapped road testing cars for conditions like this because of limited availability of smooth roads. I spent a lot of time involved in this issue, but these problems arose well past the short warranty at that time. I learned a lot during on the job training. Made a lot of of mistakes trying to pin down the source of problem.