This is just a heads up for those that may find that when you wash the engine bay or do a water crossing and sometime after, you go to start your Rok after it has sat idle for a couple of weeks and it feels like the motor suddenly shakes violently on start up, which is what happened to us, this is what I found.

There is a hole on the top left side of the Bell Housing, now in our case this is an open hole with no pipe like a breather and is flush with the surface, this allows water and in our case soap to seep into the bell housing, I'm guessing over time this has gone stale and muddy, this has probably sat on the clutch and caused the plates to become stuck together, causing the violent shake, especially if you start the car in gear with the clutch pedal in.

So I've taken out one of the wading plugs under the bell housing
(there was quite a bit of muddy, soapy water in there) and drained all the muddy soapy water out, flushed the bell housing with clean water and dried it out as much as I could, this will be tempory until I get the thing that is supposed to be in the hole at the top and extend it up out of the way like a diff breather.

I only hope this hasn't damaged the seals at the back of the engine and the front of the gearbox, only time will tell.

My advice is to check this, pull the rubber drain plug out of the bottom of the bell housing, also check if your Rok has the hole with nothing stopping water to get in.

Baz.