Renault PK6 Gearbox Overhaul: Setting Clearance on Tapered Roller Bearings

Hello
I started overhauling the gearbox, I thought the topic would be simple (replacing the bearings), but it turns out that the fun begins with setting the clearance on the tapered roller bearings and maybe someone has experience how the shaft should rotate after twisting the halves? For now, I am at the stage where the shaft turns smoothly, if you turn it more, it will turn a bit and it becomes, I don't know if it's still too tight? shouldn't it perform e.g. from the entire turnover? As you know, the bearings are falling in these boxes and I do not want to pull the boxes again in a few kilometers because the bearings will fall apart And all the time I have mixed feelings about how it should be because if there is too much play, it will rumble, and if it is too small, the bearings will get caught

There must be some slack as the bearing warms up - it will expand.
Fold it with a slight slack, use the drill with a roller on each gear - check if it is roaring.

The bearing tension is measured with a special mill and is given in Nm.
Case manufacturers use cup springs to tension the bearings, which compensate for the tension as the bearings wear.

I mean specifically about PK6 boxes and basically the question is for people who deal with the repair of these boxes