727 5-Gear Steel Front Straight Cut Planetary and 4-Gear Aluminum Rear Planetary 2.28/1.45/1:1.

These planetary gears are cut with a straight tooth instead of the helical cut tooth.  This offers strength and no thrusting while torque is applied.  The gears and annuluses are made from 8620-gear steel.  The aluminum planetary carriers in some of the kits are constructed from 7075 T-6 billet aluminum.  The 6-pinion front planetary carrier sis made from 4340 steel.  The 5-pinion front planetary is constructed from investment cast steel.