833 Rebuild - 2nd Gear Grinds Going Up and Bumps Out Decelerating

A dirty (not talking about the neutral gate...but dirt) shifter can cause shifting/grinding stuff as you describe. It's happened to me. I thought a small bit of resistance in the shift plates wasn't a problem. I took the shifter apart anyway, cleaned and lubricated (teflon) every shim and plate. Wow. Huge difference. Shifts now like the shifter rods are connected to nothing but air.

Douching the shifter down from above with cleaner/lube didn't do the trick. It had to be taken apart to be cleaned effectively.

You have noted a number of different symptoms with the same shifter/rod adjustments. Why would that be? Maybe something else is an input to the equation...like a dirty shifter.