did you ever figure out what was causing this issue? i have a similar noise on my 15 viper ltx. like a grinding noise when the key is shut off. runs and sounds fine while running, only makes the noise when engine is shut off, or when the key is just cycled without starting it.Ok guys hopefully someone here can help me quick..... I shut off my m7000 today and it makes a weird noise as motor dies like a metal on metal rubbing noise almost sounds like a servo motor disengageing . It doesn't sound funny when it's running just as the engine dies. When the key is shut off. Sled has 400 miles on it. And has never made this sound before. Has anyone else ever heard this????