vibration below 60 mph

[bigdaddycummins]

i havw owned 4 ctd and always had vibration between 45 and 50 when torque conv locks my new 06 is really bad between 35 and 60 any ideas i just had power steering gear replaced thats when it became really noticable i always was so thrilled to get a new truck but this 06 is really starting to bumb me out thanks for your thoughts

 

[HighRanger]

Tire Balance? Usually under 60 is tire issues.

 

[JEstes]

You might want to check your driveshaft too. I've never had this problem, but a friend of mine had one that was very simmilar. His driveshaft ended up being out of balance ever-so-slightly.