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Transmission issues

7.5K views 10 replies 4 participants last post by  mr_et2  
Sounds like the transmission pump flow control valve is bad.

This happens when the fluid gets contaminated with small metal bits that eventually score the flow control valve and bore causing pressure loss.

The result is performance and codes like you're seeing.

Unfortunately, you can't get to it without taking the trans apart (vid below).

 
When i was finally able to replicate the dead pedal my wife was saying and it did it from a stop sighn then did it backing into the driveway
Sitting in park I hit the pedal and their was a 4 secound delay before it reved .that is why I have changed my mode from tranny to throttle body issue probably the sensor cause I shut the car off turned it on after that and it would rev normal again in park and nuteral. Tried Attached a video of the delay but it won't let me
A couple more suggestions:

On the throttle body, if you've ever heard a "click-click-click-click-click-click" from under the hood when the key is turned "on" before cranking, it's possible the plastic gears in the throttle body are stripped and slipping when the system tries to do the calibration.

On the transmission, if you have an android device and a bluetooth obd dongle, consider downloading the CVTz50 - CVT diagnostics with ELM327 app. Use it to take a look at the transmission pressures and compare what you see to the chart below:

Image
 
TBH, I'm not sure if that will work or not

There's several different ELM327 adapters around, some of the less expensive ones can work but aren't the fastest when it comes to data speed which means slower updates when troubleshooting.

I bought this one, but it's a tad on the pricey side: