ax-15 trans conversion; auto to manual

Subject has been beat to death I'm sure but... My 97 TJ has 190K and it's time for a new trans. Over the years I've put a 3" lift, 35" tires and upgraded to 4.56 gearing. I use the TJ for big road trips to camp and race my mountain bike. Due to locations, there's a LOT of highway driving and...