1994 Pontiac Grand Prix steering

Steering problem
1994 Pontiac Grand Prix 6 cyl Front Wheel Drive Automatic

the car i'm driving is 94 grand prix, my probablem is when driving either slow or hyway speed when I go around a bend (not corner) to the right the car shimmers and the steering wheel vibrates but to the left it is solid and no vibration, i'v already changed the outer tierod ends, my only guess could be of these three things; the inner tierods, ball joints or rack and pin steering gear which the mounts seem to be solid. Any ideas would be helpful to narrow this down would be great.