The trans gearbox one is filled with brown oil. Realy easy to change. , Remove the 15mm bolt that goes though the middel of the mount. Then jack up the gearbox, Remove the 3 13mm bolts that holds the braket onto the gearbox (this will just lift off giving you more space). Then theres 2 13mms that hold the mount into the cup, Lift out and replace then just bolt it all back together again The other side ive never done but try doing it the same way.. good luck