Truck makes a gargling/bubbling sound at startup- usually only when it sits for some time like over night. Makes it for about 1-3 minutes then it's gone. It doesn't happen each time started after that like if running errands or something. It is really only audible from cab- under hood sounds normal and the truck is running fine. This started about a week ago a day or two after a 21 hr trip. I have read heater core (fluid is full and is clean) and trans filter may make noise- I have less than 2k on my new trans. Any thoughts?

 

gargling/bubbling sound

I don't know who she is, but she sounds like a good time

Have you had an oil sample done? It's good to send in a sample periodically

 

Lol! I have not done a sample- definitely sounds like it's coming from the trans- oil level and trans fluid levels are normal. Throwing code P1740 TCC/OD solenoid malfunction. I have read that is normal for aftermarket TC since they are lower stall. Is there a way to post a video?