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1994 Toyota corolla speedometer jumps to 45 mph then drops to 0 mph and stay's there is it a sender problem if so where is the sender located?

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Wiki User
03/06/2008

I have 3 possible solutions: first, replace the speed sensor. it is located on top of the transmission. if this didnt work, then try replacing the speedometer. last but not least, if all these failed, replace the ecm.