that would be my friend, that ever since factoty, that car hasnt seen the light of new gearbox oil? i did drain my mates 150,000km factory toyota gearbox oil and found only 1L was in there. very scary and very runny almost the consistency of water... and black i should also add. after the change, tremendous difference to shifting. looked like all the lubricating properties of what was left of the oil was gone. im guessing your car has been driven at least 100,000 kms?