Paul,
When you replaced the bent trailing arm, did you also renew any bushings? How many miles were on the car at the time? After reading all the good responses, looks like I should go ahead and replace the trailing arm that is suspect, and do all the bushings while I'm at it since I'll be pretty far into a labor investment at that point and while the car is in exceptional shape overall, it is 20 years old and I would imagine bushings can deteriorate just from age alone.
Thanks