Is my ecu bad? on 1995 Toyota Corolla

Sometimes when i'm driving either on the highway/city, my speedometer will start fluctuating and will hesitate to accelerate/jerk. It will snap out of it eventually and return to normal driving. The "O/D off" light will start flashing code 11. What do you think the problem is?

by in Baltimore, MD on October 02, 2012
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1 answer 2 comments
ANSWER by , October 03, 2012
could be a bad speed sensor
COMMENT by , October 03, 2012
My speed sensor + shift control solenoid were replaced.. no luck :/
COMMENT by , October 03, 2012
could be the instrument cluster