Turning it over isn't all that hard for a properly equiped shop. If JB is your only option, then reach over your hip and grab that little square leather thing and pull out some of that green paper. Do some research, talk to people in your area and make sure you know who is best, and get it repaired right. The cost of that case alone is worth it, and splitting it and removing all the gears for a case replacement is more expensive, IF YOU CAN FIND ONE!!
Nothing wrong with JB, but you need insurance, so get it done right.
David from jax
If your not sure it is worth it, take a couple of hours and try to find a replacement case or complete transmission and that will help you decide.