Did the needle spin free when you replaced it?
Is the needle bent and rubbing on the gauge face?
The only other thing I can think of is that the shaft is off of the bearing on the back of the tachometer, and I've never gotten that far into it.
The good news is that spare tachs are not nearly as expensive as spare speedometers (although you may not get one cheap with the redline that you want).
Why did you remove the needle?
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