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Mazda 3 transmission

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Old Jul 27, 2025 | 08:27 PM
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Default Mazda 3 transmission
I have a 2016 Mazda 3 blew a head gasket and I put a used motor in it . Now I'm have transmission issues , codes for incorrect gear ratio across all gears and only really moving in reverse . Ran for about 10 minutes at first then nothing in forward gears . Anyone run across any issues like this ?
 
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Old Jul 27, 2025 | 09:46 PM
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Welcome to the forum
 
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Old Jul 27, 2025 | 09:48 PM
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1st...You need to scan and acquire all the codes you can find in all areas of the ECU
 
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