I've recently started having an issue with the right-rear of the car starting to shimmy around 40mph. Sometimes it will start earlier, but that's the consistent mph. The shimmy will persist while decelerating, braking, and even in neutral (I have a 5-speed manual transmission) until I have come to a full stop. It's not a tire balance issue as it persists even after swapping front/rear tires. I've replaced the rotors and pads and cleaned up the e-brakes since it started so that should eliminate those factors. Wheels and tires are all four the same. First time posting on a forum so not sure what other information would be useful but any help is appreciated on what the cause may be or further troubleshooting to do. Thanks!
