2004-06 GTO Differential gears, 3.90 ratio



At last, a quality made and affordable ring and pinion set that is made by Motive Gear.

The 3.90 gears will increase the torque multiplication, it is one of the best mods you can do to get the heavy GTO’s off the line.

A gain of anywhere from 2 tenths to as much as a 1/2 second have been reported by switching to 3.90 gears.