I have the same problem as two other members but I found no good answers. The 2CARPROS members were ROBBOB3871, 2001 LTC @ 61000 miles and KHUT, 2003 LTC @ 89000 miles.
I have a like new car listed above with 89,000 miles that just developed an intermittent pulsation that only comes from the rear of the car. The pulsation feels like road edge rumble strips or activated anti-lock rear brakes. The pulsation occurs for only a second or two then stops and reoccurs every few miles or so. At first the pulses were very fast then the rate slowed and they occur every few miles. The car has newer tires, air suspension springs and brakes and the highway was smooth at about fifty five to sixty mph. The ride remains very smooth all of the time. I have never heard of this problem and hope someone has an answer.
I have a like new car listed above with 89,000 miles that just developed an intermittent pulsation that only comes from the rear of the car. The pulsation feels like road edge rumble strips or activated anti-lock rear brakes. The pulsation occurs for only a second or two then stops and reoccurs every few miles or so. At first the pulses were very fast then the rate slowed and they occur every few miles. The car has newer tires, air suspension springs and brakes and the highway was smooth at about fifty five to sixty mph. The ride remains very smooth all of the time. I have never heard of this problem and hope someone has an answer.
Mar 10, 2017 at 2:49 PM