Gears on the secondary shaft

WARNING: This page is about a different car, the 2013 Acura MDX, 2012 Acura MDX, 2011 Acura MDX, and 2010 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.

1st gear is engaged/disengaged with the secondary shaft by the 1st clutch.
2nd gear is engaged/disengaged with the secondary shaft by the 2nd clutch.
5th gear is engaged/disengaged with the secondary shaft by the 5th clutch.
Idler gear is splined with the secondary shaft, and rotates with the secondary shaft.