Question about 1989 Toyota Celica Liftback

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Celica 4WS, auto, 1990- overdrive not working

Hi. Please help me...
This old girl is beautiful, goes well and looks good in and out but last week, after working fine these past few years, refuses to go into overdrive.
One day it was fine, the next morning when I went to work, it was running at over 4000 and despite pressing the OD button, not a change in revs or anything, except the light going off/ on.

I'm hoping its not going to cost me three arms & both legs to fix, because its attached to my heart. If I have to let her go, well, I will be sad.
Please help me.
Thank you everyone, in advance.

Adey girl

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  • georgewiring Oct 09, 2008

    Thanks Toyota Ed.

    It is a guage but has no numbers on it, only Cold through Hot levels.
    I think that remains near enough the same as always, around midway or just to either side of it depending on my driving manner.



    I was told by my friend it may just be a fuse, but he doesn't even know where the fuses are so was of no practical help to the problem.

    I may get a thermometer & take the cap off after a run and see what it reads. It might be the answer.

    Or else take it to the professionals.
    Thanks again.

  • Toyota Ed May 11, 2010

    Question: Does you car have a temperature gauge? And, if so, where is the temp reading whilst you are driving? There is a sensor in the system that allows the OD to engage after the coolant temp reaches 172 degrees F. If the coolant temp is lower than 172, the OD will not engage.

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  • Toyota Master
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The fuse for the overdrive is the 15 amp "Gauge" fuse. Since the OD light is working, the OD system is getting the right power. Methinks that you have, at best, a seized or sticking OD solenoid. What I would do at this point is to take the old girl to a service facility, and treat her to a complete transmission flush. Not just changing the fluid, but a complete flush. This may clean the sticking plunger on the solenoid, and get you & her back on the road. At worst, you may need to change the OD solenoid. Not too awful expensive. Get her flushed, and post me back. Thanks.

Posted on Oct 09, 2008

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