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Possible transmission issue, 2004 Mazda RX8 6spd Automatic

Tiny
DMDEBAR
  • MEMBER
  • 2004 MAZDA RX8
  • 100,000 MILES
The check engine light is on, again. We ran the code and replaced the D solenoid. The check engine light has re appeared and the AT light now appears at random. When the AT light is on, the car feels like it takes off in 3rd gear and wont shift thru the gears. The rpms will not drop either. This is not an everyday thing, but happens pretty regular. The fluid was changed, during the last solenoid change. Please advise Thank you
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Thursday, September 5th, 2013 AT 3:55 PM

7 Replies

Tiny
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  • MECHANIC
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Can you please tell me the exact code numbers not code descriptions?
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Thursday, September 5th, 2013 AT 5:43 PM
Tiny
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I don't have the code numbers, but can get them by Monday. We replaced the D solenoid, which I'm pretty sure is the shifting solenoid. I can get back to you on Monday with the numbers. Thank you
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Friday, September 6th, 2013 AT 8:26 PM
Tiny
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Alright sounds good.
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Saturday, September 7th, 2013 AT 7:23 AM
Tiny
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  • 4 POSTS
Here are the code #s - PO768 solenoid C, thought it was D, this one has been replaced once. But, is now registering again.

The other code # - PO740 TCC Solenoid Like I stated previously, when the AT light appears, the vehicle is very sluggish from the start and the rpms will not drop, The TCC solenoid has NOT been replaced! Could replacing the TCC, solve our problem? Thank you for your time

Do you know if there have been recalls regarding this issue?
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Tuesday, September 10th, 2013 AT 12:55 PM
Tiny
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The P0740 could be related to other code.I don't see any bulletins or recalls for those codes. Have you checked all the connections and wires?Does the code reset as soon as you clear it?
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Tuesday, September 10th, 2013 AT 3:55 PM
Tiny
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Yes, the code does reset. Wires/connections are good. A friend of mine stated, the valve body could be goin bad, any thoughts? Next step is to replace the TCC solenoid and see what that brings us. I appreciate your time.
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Wednesday, September 11th, 2013 AT 7:33 AM
Tiny
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Are you sure you replaced the correct solenoid?Also after you clear the code it comes right back as soon as you start driving?
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Wednesday, September 11th, 2013 AT 8:15 AM

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