Hey guys quick question about my gearbox.
Now it's a type r gearbox, I believe a S80 LSD with 4.7 FD.
So the other day I was doing a service on the car, I noticed there was a minor small crack on the gearbox case (underneath).

I've hardly driven the car maybe < 1000kms or not even, I'm not sure if it was my fault or it was already there when I bought the package. (I should of double checked underneath) From what information i've received from the seller he advised me the clutch was a Toda brass button clutch soon as I heard this I wanted to replace to something like a sports organic and been riding the clutch to smoothly drive it and not kill the gearbox.

Now the gearbox seems silky smooth no crunching yada yada yada and so on.
What future issues could the crack on the gearbox cause?
How much for a repair?
Is it even repairable or would it need a need a new casing?

I had a feeling this was bound to happen soon as I heard that the previous owner threw a brass button Toda clutch. At the moment I can't afford to change the clutch. I plan to change the clutch on it but keep the Toda lightweight flywheel. What's compatible with the flywheel?

Any information would be help.

Thanks.
PS. will upload a photo when I get home from work.