1995 Toyota Tercel. l39,000 miles. When engine is cold, overdrive takes longer than normal to shift to the highest gear. Feels like traveling in 3rd gear when you should be in 4th. Is this a serious problem or can this be remedied for about $3-500.00. Thanks
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This is a normal condition, the nag transmission control module needs to see a certain temperature of the fluid before shifting into overdrive this is due to fluid viscosity, if the fluid is too thick due to cold temps the pump cannot supply enough pressure to fully engage the overdrive clutch, if it did you would have slippage in overdrive
Hello. My name is Toyota Ed. Please allow me to assist you.
The truth is, your Paseo is working properly.
To lessen emissions, Toyota does not allow the overdrive to engage until the engine temperature reaches 177 degrees F.
The "OD allowed" temperature is determined by the coolant temperature sensor on the engine. This sensor prevents the computer from allowing the OD to engage until the 177 degree threshold is met.The warmer the coolant is, like in the summer, the faster the 177 degree plateau is reached. In colder temps, like in winter, it takes much longer for the coolant to warm up to the desired temperature, thusly taking longer to shift into OD.
If the overdrive engaged before 177, cold-engine emissions are more abundant.
There is nothing that can be done to change the point at when the OD is permitted to shift.
So, your car is in excellent working condition. Nothing to worry about, now that you understand the basic design.
Thank you very much for choosing FixYa for assistance today. I hope that my input proves useful to you. If so, a 4-thumbs up rating form you would be greatly appreciated.
Seems like its the overdrive band,.... it's worn. Although its a low wear band the vehicle is 14 yrs old.
No save your money a synthetic ATF isn't gonna do the trick.I can't recall does this model have the overdrive switch on the shifter handle ? Turn the feature off if its got the switch. But you need a tranny rebuild.
The transmission will NOT shift into the final gear (overdrive) when the coolant temperature is below 177 degrees F. The OD is coolant temperature controlled. In short, the colder it is outside, the colder the engine is, and takes longer to warm up to operating temperature. The coolant, when it reaches 177 degrees F, satisfies the temperature sensor, which allows the final shift. Assuming that you do not have a thermostat that is stuck slightly open, this is a normal occurance. Thanks for choosing FixYa for assistance.
The throttle position switch has some effect on shifting but should effect both hot and cold. It is normal for Toyota vehicles to lock out the overdrive upshift (3rd to 4th gears) until coolant temperature reaches approx 180 degrees f.
Hi. 2005 Corolla CE. It's normal. They tend to do this when upshifting form 1st to 2nd gear. No timing chain readjustment needed.
96 Corolla. Overdrive not working properly, if not engaging after 45mph constantly. If driving on the city, is normal, but not after 45mph, when the car is trying to engage overdrive in order to save gas and preserve the trans gears. If not able to get help at the dealership, find another one and explain them the situation.
i had the same problem after spending $500.00 for toyota to look at it they didnt fix it and suggested i it was the auto trans and i should get it overhauled costing thousands. i didnt believe them and started to do some of my own research into the problem. the coolant temp sensor at the rear of the intake manifold tells the ecu when the engine is at correct operating temp then allows the auto trans shift into overdrive. to rule out any problems with the auto trans i disconnected the plug to the temp sensor and went for a drive when the engine was cold and it shifted straight away into overdrive no problems. you can't leave this disconnected because the engine is hard to start when cold as the temp sensor also tells the ecu that it is cold and allows the cold start injector to inject more fuel into the engine on cold start up.to overcome this i cut the wire to the sensor plug and installed a switch which i installed into the centre console.now i start the car flick the swith use overdrive then swith back to normal after car has warmed up . engine fault light appers on dash when switched on but doesnt matter. i have had this modification for 2 years now no problems.