just back from the mechanic workshop in alice springs. it appears that the filler plug on the gearbox had not been tightened up properly by the mechanic in orange after the gearbox oil change - if at all. i'd say during the rough dirt road runs the filler plug had come undone and eventually fell on the under tray on the sealed section.
anyway after draining what little oil was left in the gearbox all 153 mils of it another 2 litres of oil was added and car tested dríven and box appears ok according to them and 2 hours and $247 later I am out of the mechanical workshop. i'd class his price as highly over the hill. 2 hours to change the gearbox oil....I must have got stevie wonder!
i must admit the above price also included the cost for the mechanic to take the mx5 for a test run to the open limit speed section outside alice springs and see if there were any noises in 4th 5th and 6 th gears.- according to the owner of the business.
the owner only mentioned this after we were patently waiting in the service centre after we saw the car leave the garage and 15 minutes later still no car.
I thought I could do that job myself
any way I will know how the box is after I drive it around over the next few days or so.