81A-7222 shifter housing detent balls and springs

[Bored&Stroked]

I only run the original stuff . . . see no value in stronger springs.

If your transmission is popping out of 2nd gear, the problem is related to clearances and parts wear. There are plenty of rebuilds that pop out of 2nd (due to these sorts of issues) - and I know of no vendor that will guarantee that his/her transmission WON'T pop out of 2nd.

If you have any questions specific to clearances, parts or rebuild techniques, feel free to DM me.