The C2 and C3 Corvettes’ differential comes factory with a 17-spline inner flange yoke that can be prone to failure. This super strong 300M version has the spline updated to a stronger 30-tooth involute profile. It is produced with a through-hardening process and shot peening. The inner yoke shaft features a billet u-joint cap (p/n 50237) that attaches with studs and a 12-point ARP nut. The standard Corvette posi-traction is modified by slightly increasing the bore size and using a 30-spline axle gear that is common to the 12-bolt GM posi-traction units. A simple machining operation to the posi-traction case is required. With this change, a standard GM c-clip or the included machinable MW c-clips (part number 50247) can be used to retain the yoke shafts. New, modified Eaton™ posi-traction units are available as part number 19670-MOD. Sold as a pair. Installation - Service Instructions can be found on Service Bulletin #0111.

**NOTE** These yoke shafts WILL NOT work with C2/C3 Corvettes that have been modified to use a GM 12-Bolt posi & gear. For those 12-Bolt modified Corvettes, use p/n 50248-KIT, which includes the driver's side and passenger's side inner yoke shafts.