Hello, purchase a used 2000 honda accord 3.0 v6 last week. Get in this week engine light on and d4 flashing, had mechanic diagnosed bad shift selonoid b ordered selonoid a and b. All selonoid are clicking even dual. I still replaced a and b the problem still same. Question: replace transmission or try fluid flush and refill with honda tranny fluid first? Thanks

 

A drain and fill never hurts....What is the exact code you are getting?