Adjust the brake band NOW!!!! or else it will wear out the high gear clutch packs...
You need to loosen the lock nut and turn the adjusting screw/nut 3/4 of a turn clockwise and then tighten the lock nut back up. And when you loosen and tighten the lock nut you need to hold the adjusting nut still...
Edit: sorry if I made it sound confusing look at this thread
http://www.subaru-svx.net/forum/show...and+adjustment
click on the tranny1 pdf and scroll to page 11