Which gears are best for good & quiet. GM, Richmond, or Motive?

 

All of those are good, and getting them to be quiet is about the setup, not about the gears themselves.

 

My Motives make about the same amount of noise as the stock ones did.

 

GM and Motives are generally quieter those most others. Most noise comes from poor set up or a distorted axle housing (which is a LOT more common than most people think on the 10 bolt). Richmonds, no matter how well set up, are going to be noisy.

 

This is a really good topic for the Drivetrain forum. Very little about LSx engines.
Soooooooooooooooooooooooo I'm moving this to where it should have been posted.