My transmission seems to be revving up higher than usual and I now have to shift earlier. Before I could drive at around 70km/h in 4th while revving at 2200rpm. Now the second I go past 60km/h in 4th it’s over 2700rpm. I used to be able to push 2nd up to 80-100km/h at 6000rpm but now it’ll only push 60km/h at 4000rpm and start to lose power. What could be the issue?

2008 Volvo V50 T5 M6 AWD