master t35 driveshaft play

i noticed some gearbox oil issuing from where the drivers side drive shaft comes out of gearbox ..digging further revealed play in shaft as it goes into gearbox,,more than the other side ...gearbox is perfect no noises ..
but how much is too much...
how do i remove driveshaft ...has it got a drive pin etc
tia phil

master t35 driveshaft play