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			Lots of folks on here can address this, I seem to recall when swapping out my 85mph for a proper speedo that there has to be the matching sensor for the speedo unit to avoid what you describe. Any sparts changes on your car that would coordinate with the readings being off? Someone on this forum can be much more specific.........
		 
		
	
		
	
			
			
		
		
		
		
		
		
		
	
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