Bigger game in differential, switching long

Luck On with each other, I’m here again with a question. The Volvo spins off its kilometers as if it were from yesterday, the hammer. But one thing I find a bit disturbing now, that I can’t switch through gently, i.e. from the two to the three, as well as from the four to the five, actually in all aisles There is always a certain resistance, only with a small pause in idle, i.e. in the middle of the switching process, I can continue to switch, especially if you have a little more L Is it possible to re-create it? I have also noticed that I have a relatively large game in the differential, if I turn the one wheel, it takes a long time to hit the opposite or it turns against the direction. Is there something defective? You can also notice this when driving, in the 3rd gear with thirty km/h it jerks something, the path hissing off and driving is a little big. Now it has a good 310,000 km down, should I have the gearbox reworked? Dan ke many greetings and nice weekend Ronny