The output shaft in a 3/S is a critical driveline component and a common wear item. It is also a common failure point if the car is launched hard or often. Particularly the 18-spline stock output shaft is very weak and not recommend for launching, especially on a prepared surface like the track. When the output shaft breaks or strips you may overstress your costly VCU inside the trans and cause expensive damage. You may also find the car will not move once the output shaft is snapped or stripped. It is not recommended to drive the car if the output shaft is suspected of being bad because it can rapidly burn up your VCU.
For 5 speed cars it is highly recommended to use a 300M shaft.
This is a very nice used 5 speed 18 spline 300m output shaft that fits 18 spline 91-92 3000GT VR4 and Dodge Stealth AWD 5 speeds. There was some surface rust on the splines that we glass blasted off and oiled.