Just last week got the eco mode and transmission flash from the dealer. But the eco mode still stays on when you turn off and on the truck even though I turned it off . My fiance says the truck lags more now than before.

 

Soooo..... Take it back and tell the service dept.

 

lag might be due to transmission relearning driving habits

 

Hi djv154,

As jkeaton recommended, I would bring your vehicle back to the dealership and let them take a look at things. Keep us posted!