Car will not shift after oil change

2002 CHEVROLET CAVALIER
170,000 MILES • 4 CYL • 2WD • AUTOMATIC
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SARAH TRESCOT
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I took my car to for a routine oil change and as soon as I pulled out of the parking lot, my car wouldn't shift gears. The car was running/shifting perfectly fine before I took it there. Now it won't shift out if high gear. My boyfriend has added four quarts of transmission fluid and it still won't shift properly. Is it possible that the mechanic mistakenly drained the transmission fluid?
Dec 25, 2018 at 11:31 AM
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ASEMASTER6371
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Good afternoon,

How many quarts did your boyfriend add?

yes, it is possible but if the level is correct then it should shift.

Did you return to the oil change place and ask them to re check there work as they may have disconnected something during the oil change?

https://www.2carpros.com/articles/automatic-transmission-problems

is the check engine light on? if it is, can you tell us the code?

Roy
Dec 25, 2018 at 12:47 PM
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SARAH TRESCOT
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He added four quarts so far. And yes, I did return to the oil change place. They told me there was no way to get to the transmission fluid without going to the dealership, which was obviously a lie. Then they told me the transmission fluid was burnt and black. They told me because the transmission fluid was never changed, my transmission fluid had burnt up. The check engine light is on, but we would have to check the code.
Dec 25, 2018 at 1:03 PM
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ASEMASTER6371
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sounds very fishy.

If they knew anything about cars, they would know how to check and add transmission fluid. that is there job.

let me know when you get the code.

Roy
Dec 25, 2018 at 1:07 PM
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SARAH TRESCOT
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I thought so myself. He's going to go down and talk to them tomorrow and try to get somewhere. Unfortunately, they talk to me like I'm stupid because I'm a woman and don't know a ton about cars.
Dec 25, 2018 at 1:10 PM
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ASEMASTER6371
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Let me know what they tell you.

is this a franchise oil change place or private shop?

Roy
Dec 25, 2018 at 1:13 PM
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SARAH TRESCOT
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It's a chain. American Lube Fast.
Dec 25, 2018 at 1:14 PM
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ASEMASTER6371
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Good, once you find out their response, make sure you document it for your complaint to the company.

Roy
Dec 25, 2018 at 1:16 PM
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SARAH TRESCOT
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Definitely. By they way, the speedometer doesn't work now either.
Dec 25, 2018 at 1:28 PM
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ASEMASTER6371
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Okay, that is most likely the reason it will not shift. without the speedometer working, the PCM will not know the car is moving and cannot tell the transmission to shift.

Have them check the vehicle speed sensor to see if it is connected. when they changed the oil filter, they were right at this sensor.


Roy
Dec 25, 2018 at 1:49 PM
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SARAH TRESCOT
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Roy, you have been so very helpful! Thank you and Merry Christmas!
Dec 25, 2018 at 1:55 PM
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ASEMASTER6371
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You are welcome.

Merry Christmas to you and yours.

Always glad to help.

Roy
Dec 25, 2018 at 1:58 PM