92 Sc400 Rotating Noise At 80 Km On Highway

[Crsmooth21]

Hey there I have a 92 sc400 and recently when I get on the highway I hear a terrible rotating noise which appears to be on the right side , got my diff fluid checked and it seemed to be good ... I'm curious to know if it's a possible wheel bearing or not , the sound goes away when I come off the highway and go down to 60 ish or even 70 km ... Any thoughts on what the issues could be ? Wheel bearing ?