I was informed over the weekend around the campfire
that it is not normal for the gearshifter to move when
you let off the gas while driving...sign of mainshaft
movement possibly from improper shimming.  This news
struck terror in my heart cause mine moves (a syncro).
On the way home,  i checked and it does indeed move
about an inch (from front to rear, or rear to front)
when i let off the gas in 4th gear on the highway.
There does not seem to be movement in the lower gears
when shifting through the gears from 1st to 4th, but I
need to check the movement out more carefully.

 i am curious as to whether a little bit of movement is
normal, or whether there should be none, or whether
anyone can confirm that movement is symptomatic of a
main shaft that is moving back and forth in the case
doing damage that needs to be corrected ASAP.

Thanks!
Steve