2002 v6, guessing 4r70w tranny. When i turn the od off, OR when its in the last gear before it (under 40mph) it generally vibrates, i dont know what causes this,, when it hits OD or is any other gear there are no vibrations.. Any idea on what this may be?

 

Mine does this too. I figured it was normal. It only happens at like 38-40mph, though.

 

I believe its pretty normal. I don't remember, but I'm thinking its normal, lol. Idk, the 4r70ws are damned strong regardless...mine hissed and whined at me for i don't remember how long..