shifting hard need help! 12 dbl cab 4x4

i just recently bought my tacoma a few moths ago and only have about 2,500 miles on it.. but i have noticed that if im going around 35 to 40 mph down a small incine/hill and let off the gas so i do not speed the truck shifts down in gear so hard that it feels like you slammed on the brakes almost like when i had my 94 pickup 5 speed and i shifted from 4th to 3rd gear and i was going to fast for 3rd and the rpm would go up! anyone else have this problem or should i make a case with the dealership? Also i do not drive this truck hard at all being that its my first brand new truck.. thank you kevin

 

Down hill brake assist.
It's normal.

 

ok wasnt sure thanks for the reply! so when that brake assist kicks in.. it is normal for the trans to shift and rpms to go up? sorry just making sure

 

and i see you work with all pro... i have been looking for yalls release date on the 2012 front bumpers?