The gearbox oil was changed at 80,000 miles and there is still around 8,000 miles before the next oil change is due. I guess my question is that when this problem first becomes apparent is the deterioration generally gradual or rapid? or is this not possible to quantify?
Is this most likely to be an ECU problem or a mechanical one or maybe both? It sounds like I have been lucky to get to 112k miles without a problem. I have heard that changing to the 7 plate clutch solves the issues that these transmissions suffer is this the case?