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Harsh shifts, code P0961

Tiny
MIKE MCGILTON
  • MEMBER
  • 2007 CHEVROLET TAHOE
  • 5.3L
  • V8
  • 4WD
  • AUTOMATIC
  • 175,000 MILES
I have the SUV listed above with a 4l60e. I'm having a harsh reverse to drive and 1-2 shifts. Has a code p0961. Changed pressure control solenoid and didn't help. Is there anything I can test further relating to this code?
Wednesday, January 26th, 2022 AT 4:33 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Hi,

As far as this code being set, it could simply be related to a low voltage issue. Is the voltage supply (battery/alternator) in good condition and working properly? Here is a link that explains how to test an alternator. Do this just so we can confirm this isn't an issue.

https://www.2carpros.com/articles/how-to-check-a-car-alternator

Next, when you replaced the solenoid, did you inspect the wiring and connectors for evidence of damage, corrosion, or even a pin pushed or bent preventing good contact?

I attached an explanation and the diagnostics below related to the code. Take a look through them and let me know if it is something you are comfortable performing. Also, you will need a scan tool that can communicate with the modules involved.

Let me know.

Take care,
Joe
See pics below.
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Wednesday, January 26th, 2022 AT 6:11 PM
Tiny
MIKE MCGILTON
  • MEMBER
  • 2 POSTS
Hey Joe, I ended up putting new tcm in and it solved the issues. Thank you!
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Friday, February 4th, 2022 AT 2:03 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Mike,

Thanks for letting me know. I appreciate it. Also, it will likely help others.

Please feel free to come back anytime in the future. You are always welcome here.

Take good care of yourself,

Joe
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Friday, February 4th, 2022 AT 6:51 PM

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