Squeaky noise while accelerating

Recently I’ve been hearing (or just now noticing) a squeaky sound when accelerating. At first i thought it was my suspension but definitely not. I only hear it while accelerating in 1st 2nd and i think 3rd gear. I thought it could also have been a belt or something but the sound isn’t persistent. If i go up to 20 mph I’ll hear it as I’m throttling, but as soon as i put it in neutral and coast, the squeaking/squealing stops instantaneously. Is it transmission/clutch?