I have a couple of thoughts on the Tough Dog damper.
1) few dampers in the US have a spring on them--they're to damp unwanted steering input not return to center.
2) the damper/spring assembly, if mounted properly can assist return-to-center, if not it will cause the steering to pull one way or the other.
3) Properly aligned steering doesn't need a steering damper... I run 35X1250s without one.
Does your Jeep wander? You need to determine if it's due to broken, loose, or worn out parts... if not it's probably your caster setting.
Vibration? Bump steer? Wandering? Read the article (sticky) on Steering, suspension, and driveline.