Hi there i've been told that my A class needs a new gearbox valvebody as it faults changing between 3rd and 4th, i was told that it will cost about £800 plus vat, but i was wondering are these units repairable? as in remove the offending valve and clean, then refit or are they a sealed unit? as not ever seeing one i wouldn't know? Any ideas greeted with thanks.
Chris
Chris