Someone please explain in DETAIL what the vb mod is, does, costs, where to get it done, etc...

 

is your friend at a time like this ... First read up on automatic transmissions, than valve bodies, and then modifed valve bodies.

In short they
They do : Quicken shifts
Cost: 600 then -200 when you send in your core
Who to buy from: Maximum tuning,
Install: Local shop, or DIY

 

that was easy thanks!