I dynoed my truck a couple weekends ago and did alright. I had a popping issue at the top end while running tnt and my tst stacked. Now I have an issue with my truck. In the mornings I always start her and let her warm up a bit before I drive her. The problem is I have an engine vibration that is from around 1700-1800 up as it shifts through the gears. It goes away once the truck has hit operating temp. I have checked the oil level and its good, not making oil. What could be going on with my truck?? Its really annoying and I am worried about her.

 

Can you hear a difference also or is it just something you can feel?

 

Injection system seems louder and there is a strange knock when I shut her down.