My shift indicator doesn't seem to work very well. Sometimes the indicator comes on at 2000 rpms, then it will be 3500 rpms, then 3000, etc. About half the time it will never even come on, regardless of how high you take the rpms. It is sporadic, unpredictable, and has no rhyme or reason to it. Anyone else experiencing the same? Unless something is wrong with mine, it is a pretty worthless feature.