I had the AX5 out of my YJ replaced a few years ago at the National or AAMCO shop on 14th street. A couple blocks north of Kensington Road. The shop on the west side with the blue and white sign.
The owner is a golf buddy of my dads. Just tell Ed that Chris Lobkowicz sent you, and you should be more than taken care of.
Great shop, good service, good work. Its an apprenticeship place, and the apprentices do most of the work, but Ed is a stickler for details, and he pretty much checks over everything that they do. I never had a problem with the used + rebuilt tranny that they put in. A week later a u-joint went on the rear driveshaft and I beleive that they replaced it for free, since they explained that the had the rear ds off, and didn't notice it.
I hope that helps!
Cheers
Chris