Freds 73 Scamp restore on a budget

Just spent $700 on a new one with 2,000 miles on it, will have it checked out first but hoping not.
I don't know much about trannys Chuck do you think I screwed it up?
i have no idea. i wonder if it can be opened up and checked/cleaned and rewelded by a TQ builder? no idea what that would cost

You can flush out that new converter...
Fred, does yours have a drain plug like the old stock ones used to? fill with fluid, swirl around and drain? idk, can't hurt.
doesn't @CudaFactHackJob build trannys. might have a suggestion