Ys1 Transmission Noise.

Hey whats up guys new to this. I just recently bought a 92 gs with a b20b and a gsr transmission. I didn’t really know how to drive stick when i bought the car so i don’t know if I messed something up(Car didn’t make noise when bought.) There is a rattling noise coming from the transmission area. I first thought is was the distributor but its not. Weird thing is that it only does that noise when the car is moving. It stops when the car stops. The gears go in good, no pops or grinds. Sometimes reverse is hard to get in. Rare tho. Any help would be appreciated, thanks.

I will try to post a video of sound tomorrow.

Update: Problem was Abs Pump. Unplugged it. Thanks G2IC!