1999 mustang gt speedometer problem - MustangForums.com


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Old 03-13-2018, 12:08 PM   #1  
sn95.4V
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Default 1999 mustang gt speedometer problem

I am having a problem with my 1999 mustang gt automatic transmission. I made 5.4 swap and now the speedometer is not working properly. After I reach a speed of 20mph, it directly read 140mph no mater what speed I am driving. I have replaced the speed sensor in the transmission with used one that I already have and its still the samething. Can anyone help? Thanx
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Old 03-14-2018, 11:10 AM   #2  
sn95.4V
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Anyone can help??
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