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Q:

violent bucking on 2002 Saturn L200

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
when the car reachs 30-50 mph it violently bucks....really hard it shakes the passengers. what is causing this?
(1) Answer
Could be quite a few things, but I would start by thinking of a torque converter shudder - (automatic transmission, yes?), since you have a speed sensitive concern. Have a qualified technician road test with you to provide an opinion of direction.