I am assuming by gears you are talking rear end.It is a 9" rear with 3:54 gearing.Picked it up at a wrecker out of an old F150 tore it down and put on a disc kit from Wilwood and it has a Chris Alston 4 bar setup with Panhard bar.The bed is made from 1/8th inch plate to add a little weight but it doesn't help much.I built it for the street so am not to worried about the lack of traction,keeps me honest.
If you were reffering to blower drive gearing it is 9% underdriven.