Hi,
I have a John Deere STX38 ride on mower that has trouble engaging gears.
I pulled the cover off the box and found nothing obvious but could reproduce the fault so it appears to be the internal gear selector keys not engaging. There appears to be no damage/wear on them or the inside of the gears.
Do they loose there spring? This may cause this fault.
I found some of these in the shop but looking at the manual and the parts in the shop they appear to be different as longer in the thicker section.
The ones in the shop are the: 792089A
Looking at the picture in the parts manual mine appears to be the: 792123A. There are four of them.

Are these to be the likely fault?
Anything else I should check?

Bruce: can you get these for me?

Thanks!