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  1. New 2020 GT500 - Transmission Replacement After Harness, GSM and TCM Replaced

    1 - Yes, I've always wanted a Mustang, and I finally got to where I could get the car I really wanted. I guess what I'm wondering is if all these fixes and time "in the shop" is a signal that something more is wrong with this car, and perhaps I should "lemon" it and get a new one? 2. Yes. $5K...
  2. New 2020 GT500 - Transmission Replacement After Harness, GSM and TCM Replaced

    For anyone interested, the TLDR update is that we're at 71 days, and the Ford is finally moving into the stage of replacing the transmission. I would really love to get this car back, but it now feels like we're heading into a 5th repair attempt (4th unique part), and this car is potentially a...
  3. New 2020 GT500 - Transmission Replacement After Harness, GSM and TCM Replaced

    Thank you so much ... this is incredibly helpful and very thorough. I gives me alot of good information, as well as things to consider. Thank you!
  4. New 2020 GT500 - Transmission Replacement After Harness, GSM and TCM Replaced

    I don't have an invoice because they never completed any work. It's been at the dealership for 33 days, still not repaired. There was never a completed job. It's still sitting, at the dealer, waiting for the job to even complete. I'll see if I can get some paperwork on it while it's still an...
  5. New 2020 GT500 - Transmission Replacement After Harness, GSM and TCM Replaced

    Maybe it goes that direction, I don't know. With the car not working properly, even with 3 different wiring harnesses installed, clearly something else is wrong. After talking to a few different attorneys, they won't take my case because I don't have paperwork showing the multiple repairs. It's...
  6. New 2020 GT500 - Transmission Replacement After Harness, GSM and TCM Replaced

    Done! I've reached out to 5 different law firms to see who might take on my case.
  7. New 2020 GT500 - Transmission Replacement After Harness, GSM and TCM Replaced

    Thanks for the suggestions and guidance. Fortunately, we got the harness this week, which was sooner than expected. However, this harness that was received, did not resolve the issue with the vehicle. It's still dead, now with a 3rd harness installed. I have reached out to a few different TX...
  8. New 2020 GT500 - Transmission Replacement After Harness, GSM and TCM Replaced

    Good call. In Texas, it looks like 30 days and/or 3 repairs is part of the baseline. Since it's been over 30 days, it sounds like an attorney will take the case. Such a shame. I had such high expectations and hopes for this car. It was a dream car for me.
  9. New 2020 GT500 - Transmission Replacement After Harness, GSM and TCM Replaced

    Well, I was super excited yesterday when the dealer called me to tell me they received a harness! However, they installed the harness today, and once again ... the car can't get out of first gear without throwing the same error from a month ago. So I'm right back to a dead car, even after the...
  10. New 2020 GT500 - Transmission Replacement After Harness, GSM and TCM Replaced

    My CSR called me today. She said they still don't have an ETA, and can't commit to when the car will be fixed. When I asked about reimbursement for my payments, she said that Ford will not issue multiple credits, and that I would have to wait until the car is fixed to apply for a credit. Feels...
  11. New 2020 GT500 - Transmission Replacement After Harness, GSM and TCM Replaced

    Thanks for the update, I appreciate it. I've been working with the dealership and with Ford Customer Success. The Customer Success person called me today, and said that although she's requesting an update, and the dealer submitted a "Copus?" request ... that there's no ETA on the part. I...
  12. No More New Mustangs for a While!

    I wish I could simply get a replacement part for my GT500. After owning it for just under 4 weeks and 200 miles, it had a powertrain failure, and they've had my car for almost a month now, with no ability to get a replacement wiring harness. Anyone have a spare [KR3Z-7C078-B] sitting around...
  13. New 2020 GT500 - Transmission Replacement After Harness, GSM and TCM Replaced

    Thanks for confirmation on the part number, that helps. My dealer confirmed that is the one. That said, they haven't gotten an ETA from for. 5/17 is tough to swallow, since the car has already been out of commission for a month. Let me know if you hear/find anything more. Thanks!
  14. New 2020 GT500 - Transmission Replacement After Harness, GSM and TCM Replaced

    I checked with my dealership, and btown93 is correct ... the new part number is [KR3Z-7C078-B]. Let me know if you can find any information. My dealer said they had already made a request to get one from the factory, and that was declined, with no ETA on when one would be available for me.
  15. New 2020 GT500 - Transmission Replacement After Harness, GSM and TCM Replaced

    Thank you for the detailed and helpful information. I'm going to pursue this route. Thanks!
  16. New 2020 GT500 - Transmission Replacement After Harness, GSM and TCM Replaced

    I owned the car for just over 3 weeks, before experiencing a "Powertrain Malfunction / Reduced Power". The dealer removed the transmission and replaced the harness with a "new" one. When they went to test the repair, the car wouldn't move out of Park. Since taking the car in, the dealer has said...
  17. Powertrain Malfunction / Reduced Power on 2020 Cobra GT 500

    Update: The dealer has had the car for 10 days now, and it still isn't fixed. They diagnosed the issue with Ford engineering, and Ford told them to replace the entire harness, not just a pin or a piece. The dealer removed the transmission, replaced the harness, and ... it's still not working...
  18. Powertrain Malfunction / Reduced Power on 2020 Cobra GT 500

    Thank you so much for sharing. I had searched for other threads, and found one, but it was an older model Mustang. This is super helpful, and something I'm going to reach out to the dealer about tomorrow. This sounds like exactly what they are looking into, as they told me that they plan to get...
  19. 2020 GT500 Registry - Add Yours

    3330 ATXCobra [L3400]
  20. Powertrain Malfunction / Reduced Power on 2020 Cobra GT 500

    I recently purchased a 2020 Cobra GT 500 and was enjoying it quite a bit. This past weekend during a drive with one of my kids, I started to accelerate from a light, and suddenly the car started jerking back and forth, as if it couldn't properly shift. Then, the orange wrench icon appeared on...


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