Change gearbox fluid
Yupp, I changed all fluids, including the gearbox fluid when bought mine a year and a half ago.
Planning on doing a change before the summer season next year, since one change does not completely drain all the fluid in the box.
I've heard you're supposed to change at least three times in order for most of the old fluid to get out.
Edit: Mine is a 1991 and has probably not "lifetime" fluids.
/Hannes - from a cold and rainy Sweden