F-250 and f-350 trucks from 1999 up most are using 2 piece driveline's in the rear main shaft - most people try to drop the carrier bearing bracket to fix the problem - it does not fix it much -...

These are some new High performance sand car 1/2 shafts were are building - From 100 horse cars to 700 horse- JEss http://highangledriveline.com