Gear Block, Four Spider Gear, 1960-69 Corvair, Manual Transmission

Upgrade your differential

Increased strength and durability

This block allows you to upgrade your differential to a four spider gear assembly which is ideal for superior strength and durability over original equipment. Each block is manufactured from 4340-chromoly and hardened to 50 on the Rockwell scale. Installation will require modification of your stock Corvair housing or the use of an aftermarket housing, such as CIDCO or Crown. Uses stock yoke nuts and spider gears, not included.