Have Transmission Questions? Ask a Mechanic for Answers ASAP
Welcome, I'm Chris (aka Moose).
Are all shifts and gears slipping?
Slipping results in the rpms climbing fast and high with speed not increasing equally, is that what is happening?
A TCM issue rarely is to blame for a slip issue, that normally is from internal transaxle issues.
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Are there any warning lights on and codes stored?
Were there any concerns with your old or new transaxles fluid like bad color or an odor, prior to replacing the fluid?
Do you have a pressure gauge so we can check the line pressure. So far there is still not enough info to say its electrical or modules to blame.
Thanks, ***** ***** have a diagnostic tool to monitor the shift solenoids?
When the solenoids are commanded and the computer shows a gear change is the shift happening at that exact time or is the shift late?
Thanks, ***** ***** of a delay was there between actual and commanded 3-4 shift?
There would be a code if the O2 sensor were bad.
The symptom chart states this would be caused by a concern in the valve body. Have you ever removed and rebuilt a valve body?
I have no clue whom rebuilt it or there skills, so I can not speak on there behalf if all was done right or not. Yes the VB is accessed with the pan off.
I do not believe I can teach someone how to rebuild a valve body over the internet. The transmission is under warranty, it would be best for you to use the warranty on your rebuilt trans. I think its best I let someone else try to help you. Best of Luck.