I have a 97 Wrangler 4cyl, automatic and need a seal kit for the T-case. I have the T-case out and figure to reseal it while out. Is there any good place to get it from and what T-case does it have? I know its a NP231 but when I look it also has a letter after it. I am sure its not the same seal kit used in the Chevy trucks NP231 as for the TL. Different seal sizes?