I've got almost 90k on my stock clutch. Recently i've noticed it will grid once in while when shifting and yesterday when I dumped the clutch at like 3500 rpms there was no wheelspin just the engine reving and not accelerating as fast as it should. Otherwise the car runs fine. Is this a normal amount of miles for a clutch. Keep in mind i live in nyc with alot of traffic driving so I guess she lasted longer than she should have. How much does an install cost? I don't feel like going to the dealer but might have to because I don't trust anyone. What are the prices on clutches also?