Make sure its a th200C which has lock up. You buying rebuilt or used? I wouldn’t buy a used one , you need to buy a rebuild by a shop that knows them and how to do the HD iimprovements. You might buy a core cheap that is guaranteed rebuildable if you have an experienced shop in mind that can build it how you want it done but then the shop can usually supply the core at a cost and you don’t have to worry about getting a trashed out core that can’t be rebuilt. Don’t have any idea what the numbers mean, check your shop.