I believe most one piece driveshafts require this...
Or if you're like me, and buy a used GT Takeoff 8.8in Rear end with T-lok (for two-wheeled spinning out power!!![8D]), this is also a must.
I followed TacoBills instructions and there haven't been problems for the last 2 weeks I've been driving
. Thanks TacoBill!
Although the crush sleeve is not something you really want to mess up or screw around with!