THanks Rocky for explaining it better than it seems I was able to. Yes, the issue is the shaft broke off. Anyway, I have a line on a good 2 pin tach for a replacement, so we shall see how it goes.

Glenn

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2012 Mercedes ML350 Bluetec 102K (hers)
2005 Corvette 55K (fun car)
2002 VW Jetta TDI 238K (mine)
1998 Volvo S70 T5 Turbo 211K (kids)
1994 Ford F150 4WD 246K (firewood hauler)
1983 Mercedes 300D 384K (diesel commuter)