I have a shimmy that seems rather subdued until you hit 70 on
up. I have replaced the rubber flex disc in the drive line which was shot, it helped a little. Now I am wondering about the mid driveline carrier ujoint/bushing. I don't know whether the next step should be replace the middle bushing or start looking at tires again. the car has 170,000. Or possibly look else where.
Has anyone changed this middleline ujoint/bushing. It makes sense to replace it .