2-3 shift on an "A904-LA" question.

IMHO...

Unless it is a HP trans with a shift kit my guess is it is shifting just fine.

Especially if it has a bunch of miles on it.

Not a lot of load or HP needed going from 2 to 3 at light pedal
I agree. Your gonna have less drop on 2-3 and with a light pedal at low rpm's you wont notice much. Your cruise rpm surely shows it's in high gear. Next time out, get into a bit, like 1/2 to 3/4 throttle and i think you'll see it's working fine.