1993 Toyota Corolla Does not change gears when its cold

1993 TOYOTA COROLLA
130,000 MILES • 4 CYL • 2WD • AUTOMATIC
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IVANOV_JR
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  • 1 POST
I own a 1993 Toyota Corolla DX 3 speed automatic transmission. My problem is that when the car is cold, it does not change into a higher gear. I have to wait for the car to warm up, before it changes gears. Wait time is about a minute or two. Once it warms up, it starts changing gears without trouble. I looked in a lot of places for an answer to my question, but I couldn't find any information about it. We changed the transmission oil and filter, and it still does the same thing. Its not losing any oil. Hopefully you can help me out, because this is starting to drive me crazy. Thank you for your time.
Jul 26, 2010 at 8:37 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Hi ivanov_jr, Welcome to 2carpros and TY for the donation

Inspect and test the following sensors: coolant temperature, throttle positon and vehicle speed sensors-Toyota uses these sensors input signal to the computer as an indication of throttle and governor pressures and the overdrive when the computer receives these signals it commands and control the shift solenoids to provide upshits/downshifts and overdrive-if all tested good -bring it in and get it pressure tested
Jul 26, 2010 at 9:56 AM
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