[FrogPrince82]

Thanks for all the advise, it gave me a good place to start looking, and I was able to take the front and mid sections apart to check it all today.

All the belts were ok thankfully and so were the slipper pads by the look and handling of them.

What I did see was that the clicker teeth/steps had worn almost smooth on both parts. As I don't have replacements yet (they are on order now) I have super glued the two parts together, which I will also do to the new one when I receive it.

As I have been switching from full 4wd to the one way set-up trying to see what I prefer it must have worn the parts a lot.