grinding noise

[jagov]

Hi, this is my first post but i have been lurking the forums for a good month now, and with all the information i gathered i decided this would make the perfect first car.

so I went out and bought a 1995 240sx with around 150k miles, completely stock, it even has the stock radio, the only thing i would change about it is the transmission, its a automatic. however i only paid 1500 for it was worth it.

the itself is in great condition and extremely fun to drive, however when i took it out today i noticed it was making a weird griding noise in the rear passenger wheel. i checked the brake pad, rotors and looked for anything that might be scrapping against the wheel, and their was nothing that i could see. The car only makes the noise around 10mph and then when i speed up it goes away, does anyone know what might be making the noise, it is starting to scare me.....

i could include pictures if you guys want to see it, but it's just a stock 1995 240sx.

thanks for the help, and happy holidays.