There is only one way to remove what is called the reverse gear shaft without damaging either needle bearing nor thrust-washer: carefully pressing or tapping on the splined end, from rear towards front (as installed in vehicle), which makes the front brg. (the one with the closed end) pop out BEFORE it is hit by the woodruff key. This same key which normally remains firmly pressed into the shaft’s keyway has to come trough one of the 4 notches in the thrust-washer, this only being possible if correctly positioned previously! See pic of what happens if not…
So if you wanted to re-use all that small stuff just proceed carefully here…!
As a side note: TM 9-2520-246-34 doesn’t mention this, but in fig 5-2 it shows a mysterious 3rd bearing (GG) for the reverse gear, on the same shaft, between both front (CC) and rear (HH) needle bearings…!
G.