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On my '89, the speedo flashes when I hit 85mph. I've been told that there is a limiter on the gauge cluster feed. Is it possible to disengage or bypass that limiter? I notice however that the car still accelerates past 85mph so I know that there is no governor for that range of speed.
 

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1926 Model T street rod, 2000 Jaguar XJ8, 1999 Corvette.
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NORMAL! the mechanical/electrical limit is 85 mph. There is no 3rd digit! its just like normal needle type gauges of that era, which only displayed 85 mph at their limit.
 

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Ex-99 Deville and 04 DTS owner. Now 05 DTS and 07 Audi S6 owner. 5.2L V10 power!
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864 Posts
I know in my 99 deville when I changed the export code to Saudi Arabia, it did that.
 
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