Downshift = No acceleration response.

Hey all, apologies if this has been a topic in the past.

I have a 2009 Tacoma TRD, V6 4L. I've been noticing an issue when I'm giving it some gas while climbing a hill or even speeding up on the highway, it will drop a gear and then there will be no response from the accelerator until I completely take my foot off the pedal and put it back on again. It does have a lot of KM's on it (330k to be exact-ish) and have read that when they get miled up, that shift solenoids can start to becoming problematic or even Throttle Position Sensors.
I have changed the tranny fluid in hopes that it might help, but it didn't. Any insight or being pointed in the right direction would be greatly appreciated.

Thanks.

 

CEL on?
Any codes?

 

Negative.