i have just checked the gearebox oil on my felly to check if it was alright with the noises coming from it, as i took the speedo cable drive out t made a "sssshht" noise and felt a bit of air come out like when you open a petrol can this have never happened before is all well? thanks tom

i expect the breather is blockedd

could that be the reason it was making a noise then? how do i go about unblocking or fixing the breather where is it? sorry for all the questions thanks tom