Cat SXII gone 2WD?!

[Cardnim]

Hi all,

Just back from a quick practice and my Cat was starting to go into 2WD (rear only) at times. It seems to rectify itself if I manually jiggle/rotate the front belt pulley.

I have a one way pulley fitted and was wondering if it has broken (can that even happen?) and is now not supplying power either backwards or front?

Any ideas or experience with this before?

As always, thanks for the advice!