[Travis Covington]

thats not always the truth...

A light lapping compound wont hurt the gearbox. It will just remove any junk from the gears as well as helping them seat better. You gotta remember nothing is perfect.

It is true that the gearbox will technically "lap" itself as it wears in, but this is just remove any possibility of the gears binding in the new gearbox....

I was asking, as per Andy Baker reccomendations...

Maybe he will chime in???

BTW. We DID end up using a light diamond lapping compound before we put the gearbox under load. Then cleaned the lapping compund off and applied grease.

We noticed it helped ALOT. Our gearbox was CNC'd, but it wasnt perfect. Even with the lapping compund it wasnt perfectly smooth. We let the competition do that for us. Our drivetrain was the most efficient at the end of the third day of use. It had worn in just enough to make everything smooth. Since then it hasnt worn in much more. We make it a habit of keeping the gearbox covered, cleaned, and lubed. Its been working great.