Hello, I bought an 82 camaro recently and I noticed that it makes some light noise from the rear end. our truck always made the same noise when it was low, so i went to check it and there is no fill nut or plug. how would I go about doing this?

 

should be a plug on the side on the rear near the yoke might be covered in grease and dirt

 

Yea, the plug is on the right side close to where the axle tube goes into the center casting. It's a pipe plug and it will require a 3/8 drive ratchet or breaker bar to remove it.