2009 Pilot ex-l -150k, fluid replaced 5k miles ago. Shifts smoothly, never slips. Only problem as follows:

When I slow down for a red light, or to take a turn, and then speed up if the light turns green, the transmission slams into lower gear. No CEL, all motor mounts are good. Happens when car is hot. Usually when I am slowed to around 10-15 MPH and then accelerate, its a loud slamming/clunk as it downshifts to speed up. I took it to a local transmission shop. They could not find anything using any diagnostic tools and could not replicate it when roadtesting.

 

What kind of ATF did you use?

 

It was done at the Honda dealership, and the issue occurred prior to the change as well. Just included that in case someone suggested a fluid change to see if the problem would resolve.