Originally Posted by dhanna6powerstroke
You won't want to hear this but mine started out the same and it made that same noise for over 2 years. Started getting worse and worse and would do it on any type of acceleration. Also started getting delayed engagement into reverse. Eventually lost 2nd and 5th gear. Found the planetary gear failed and caused the issue.
I was hoping someone would say that whine is completely normal.
Well I'm sure a flush and good fresh fluid couldn't hurt anything. Should I move the 08 pan/filter/solenoid mod up to the top of my list and flush with some good fluid? Or should I just let it ride and see what happens?