Kickdown Question

@CudaFactHackJob I might be a little slow, but it's all starting to sink in now!

I extended the TV rod even more and took it for another test drive. Definitely kicks down and holds it on passing gear longer now.
At around 50 MPH, it holds it for maybe 3 seconds.
At around 35 MPH, it holds it for about 5 seconds.

I wound it out one more thread when I got home. How long should it hold passing gear before shifting back into 3rd?