Question about 1996 Toyota Corolla
1987 mr2 86,000 wont engage into overdrive unti approximatley 20 minutes of driving in the morning. If it is warm out sometimes sooner. The car comes right up to temp as it should. The issue seems to be more with the temp of transmission than temp of thernost. I have a 1 hour commute. The vehicle runs at 3700 rpms at 60mph until OD kicks in then 2500. In the afternoon when I get off work and jump in the car for a return trip it takes about 5 minutes to engage OD.
It sounds as much like a lack of Torque Converter Clutch as what you call O.D. I know this won't make sense to you but if the brake switch is not working correctly it will drop Lock-up of the converter clutch. In what ever gear you get to lightly step on the brake without letting off the gas & if your in lock-up the clutch should release and your RPM go up. Also in winter you will get a tighter valve body in low temp but the first shift and a few blocks later your okey. The valve body sounds dirty ,if your getting lock-up. I hope you have changed the fluid every couple years since it was new,and used the correct fluid. A fluid change won't fix this issue and never use any additives. Also check to see if you have a lock-up solenoid external or speed sensor. They will have to be tested by a professional diagnostic tool.
Posted on Oct 05, 2009
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Posted on Jan 02, 2017
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