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Ok, 98 5.4 ext cab 4x4.....speedometer stays around 40 when casually driving, when hit highway speeds it will jump from 110mph then back to 60. It is very sporadic, any takers????
Ok, 98 5.4 ext cab 4x4.....speedometer stays around 40 when casually driving, when hit highway speeds it will jump from 110mph then back to 60. It is very sporadic, any takers????
It might have something to do with your speed sensor/s not sure where they're located but thats the most logical reason