The 3.0l isn't known for eating its AR35 autobox, so check fluid level is perfect, then you are in the realms of looking further.
A full description of exacly when it happens will help the experts here offer advice on what could be causing it...
Thanks.
The fluid level should be spot on.This and the filter was changed a month ago along with a good clean out (nothing too bad just the usual grey sludge).
If the car is ever going to misbehave it is when "sport" is selected. In this case, if floored it will pick up okay but will sometimes redline and fail to change up from 3-4th or 4-5th unless you take your foot off the gas. Again in sport mode a clunk/jump can be felt between 2-3rd with the engine spinning in limbo until the gear is found and then "WHACK".
Also in sport, gentle deceleration when approaching lights/junction can result in a huge whack when downchanging from 3-2nd.
I trust the guys who did the ATF and filter change and the car behaves pretty much the same as before the change except the changes are smoother.
Took her out this morning (not in sport), freezing and she was as good as gold even though she was hard driven on the salted empty bypass.
Any clues would be great.
Thanks.
Paul.