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in my dads 94 the speedo stoped working while we were goiong down the road and now he has no O/D or lockup.. i checked all the fuses and plugs and all were good.
 

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check the speed sensor on the tranny one of the wires may have pulled loose from the plug somewhere. same thing happened on mine and that was what it was

i reread and it said you checked all plugs so you probably already checked this*
 

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my speedo and tach both went out could it be the same plug someone said PCM????
 
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