Hey guys,

I've had a search around and can't seem to find, or understand, what I need. So, here is a post.

At around 80 and sometimes 100 km/h my gear box changes down (revs drop under 2000) and the whole car shudders for a few seconds, until it kicks up again itself, or I depress the throttle a little more and the revs increase.

It never used to do it, is this something bad, or a simple servicing issue?

Cheers,