tachometer reads too high, sometimes redlines

[nep]

i have watched the RPM's through consult and it is accurate, so ill assume its a mechanical issue with the tach? is it worth taking apart and trying to fix, or should i just source a new one? below is a video of the problem

Speedometer problem 240sx - YouTube (http://www.youtube.com/watch?v=cu0WWw-bJlY)

[SofaKingFast]

Apparently our tach's have a tendency to crap out on us, have you tried a working cluster to see if that fixes the problem? Mine wasn't working at all but after I swapped in a working one it was fine. I've heard its just a simple solder connection that goes bad, but I can't confirm that.

Ryan

[nep]

bump it upp!!

[afiser]

mine jumps around all over the place, from 0rpm to hitting the little peg that stops it from going all the way around. its fucking annoying tried a new cluster, didn't fix anything.

the odd thing is that some times (very seldom) it works perfectly fine. my guess is it is wiring somewhere.