Propshaft problem

when my prop was ****ed, greasing did solve the problem of vibration and squeaking but cos there was movement in yokes and....... pins and cup were broken, it wud just throw the grease out in a short period of time and problem wud come rite back.
bought new bits to overhaul it but it got so bad that cup holes were oval not round so new prop for £100. now its sweet as.