QUOTE (1994Celica @ Apr 11, 2012 - 6:56 PM)
Someone told me that it might be the ECU could that be the problem?
The ECU is a possible cause for almost any drivetrain problem. 99.9% of the time it is not the cause of the problem, and its also perhaps the single most expensive component on the vehicle. Its rare that someone replaces their ECU and doesnt have a bunch of new issues because the ECU isnt programmed correctly, so make the ECU the last possible item on your list of things that may be wrong.
Whens the last time you drained the transmission fluid, replaced the filter, and refilled with new fluid?