There are many internal parts of the A833..
We have had both Wayne @ Brewers & Jamie @ Passon rebuild transmissions for me, they have all the replacement parts and many years of experience rebuilding these. I just pay them to do it, even if I did take it on myself I would be pretty pissed if I had to take the transmission back out for some oversight..
I like to do many things myself but I leave this task to the experts. Besides they are both great Mopar guys..

Just my $0.02... wink