A833 shift proplems

Yeah, I hate that
The neutral to first, atta stop, is typical for the A833,especially with thick gear-oil in it. This can be because,
1) everything inside has stopped spinning and now the clutch teeth are lined up such that the slider cannot pass over. Sometimes because the brass ring has locked on
2) the clutch disc does not have enough departure, and so is lightly dragging, and so nothing will stop spinning inside and so the brass ring just cannot brake the low gear to a stop.
3) the gearoil is so thick it won't squeeze out fast enough,
4) the dogone brake is too smooth,
5) the brass ring is not 100% round.
6) somebody put synthetic oil in there. Which IMO is just too dang slippery. Flush it out and install a 50/50 mix of Dextron and 80wt gear oil. with NO OTHER additives.

As to the first 5 above; the easy test is to let the car coast down in neutral with the clutch pedal up. Then just before the vehicle comes to a stop, depress the pedal and shift into first. If it slips right in, this eliminates 3 to 5, leaving just 1 and 2..
To eliminate #2, reset your freeplay a little larger than 1inch and try again. If it works now, then your disc was probably dragging. If it doesn't that just leaves
#1.. and I highly recommend a 50/50 mix of Dextron and 80wt gear oil. with NO OTHER additives. To see if the brass is locked; just shift into second and then back into first. If it goes in right away, then the brass was locked with the slider teeth butting up to the clutch-teeth on first, kindof normal, in my experience. To prevent that I usually shift into first with the vehicle still slightly rollng, as the turning driveshaft prevents a jamb-up.

I once RnR'd that A833 about 3 or 4 times in a very short period of time,trying everything I could think of to make synthetic work. In the end I poured the 50/50 back in and it shifted like lightning.

First atta stop is always the hardest in that box.
Hard into direct, while moving is simple; the brass ain't working.
Hard into any gear with the engine off and the vehicle not moving, means exactly nothing. More times than not the clutch teeth will not line up and the brass will lock on right away , and no shift can be made.