Hard 1-2 shift

[Nant96]

Hey guys, new to the forum. I have the 4l60e transmission and it shifts hard from 1st to 2nd, it's worse when it's cold, and I hear a clunk on the 2nd to 3rd shift but is smooth. So far I have

Cleaned throttle body and MAF sensor

Done 3 fluid and filter changes

Replaced the 1-2 accumulator

And the A and B solenoid

 

The transmission doesn't slip or have trouble going into gear and I've heard it could be the TPS but I don't have any codes. I could really use some advice. Im out of ideas. If you think it could be the throttle position sensor or the accelerator position sensor how could I test that. Any suggestions are really appreciated

 

2009 Silverado LT 5.3L 4x4 z71

[Heavy 5.7]

If you think it could be the throttle position sensor or the accelerator position sensor how could I test that.

 

 

Check resistance with an analog multimeter. With the engine off as you slowly move the throttle from idle to full blast you're looking for a smooth sweep with no spikes or dead spots.

[Nant96]

Check resistance with an analog multimeter. With the engine off as you slowly move the throttle from idle to full blast you're looking for a smooth sweep with no spikes or dead spots.

At the tps or the pedal? Any idea which wires there's 6 on the tps

[Nant96]

Anyone?

[jrow8162]

Sounds like the valve body in the transmission. I’ve seen this happen with  a 99.5 with a 4L60. Some scanners will pull a code even when there is no light on!