I recently bought my friend's old Giand NRS XTC 2 mountain bike that had been hanging in his parents' garage for about 6 years. I just had it in the shop for a tuneup last week and had it out on the trails for the second time since. After about half a mile, I noticed some funny noises coming from the fork whenever I rode over a bump or came down hard on it. At first I thought it sounded like something was loose and rattling around so I stopped and checked the brake and rotor and made sure the wheel was on tightly. Everything seemed to be in good shape so I rode on. By the end of the ride, the noise had gotten significantly worse and I could even feel the rattling in the handlebars. As I was about to load it on the car and go home, I tried putting my weight entirely on the front, compressing the shock as far as I could. As it went down, it let out sort of a "crunch" at a certain point, then made the sound again as I let it back up. I tried this again and again and produced the same result every time. Does anyone know what's wrong with my bike? Can it be fixed? Should I start shopping for a new fork?
By the way, it's a Rockshox Judy XC.