03-29-2018, 07:57 PM
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CC Member
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Join Date: Dec 2014
Location: Chandler,
AZ
Cobra Make, Engine: Backdraft Cobra RT3, Roush 427R Crate Engine, Tremec 6-Speed Transmission
Posts: 79
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Not Ranked
Similar problem with my Backdradft Cobra (1360)--shortly after I purchased the car. The speedometer would jump erratically at times just as you have described. I cleaned the electric coupling from the tranny to the speedo panel--located from the tranny to the passenger side of the tranny under the car. Perhaps a poor connection from installation-- just whatever. I have had problems since! Drive SAFELY! Phil
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