Makes a chirp noise when shifting from 3rd to 4th gear
Thanks for the info… Did you have a question?
I consider it desirable when my vehicles can make chirp noise from 1st through final gear but that’s from the rear tires 
The quality of the responses you get will be directly related to the time you take to explain in detail what you’re experiencing and under what circumstances…
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Automatic transmission? If so, google “torque converter shudder”. Is your symptom consistent w/that? Areyou certain this sound is new? Is it possible it has always been happening, but you didn’t notice it until recently? If the latter, it could be normal for your truck.