Shifting A Little Hard - Possible Mods- Suggestions?????

[Braggy8169]

Hey all,

I currently own a 2005 150, 5.4L Super Cab Step Side and am running a Flowmaster cat back system and a k&N intake with my Gryphon 87 and 93 Tunes. I love the tunes but it seems that when I really gun it that it is shifting hard from 1-2 and 3-4. It doesn't happen under normal driving conditions, just when I hit the gas. It almost feels like the tranny just can't catch the shift in time??? I'm not sure as I really don't claim myself to be much of a mechanic. Is this something that I can play with myself or should I look to Bill to maybe change the tune up a bit?

Also, I am thinking about getting a 4" Rancho Lift / Level for my truck with the new 9000XL Adjustables and 305-70R18 Mickey Thompson's to match? Just wanted to get people's thoughts/suggestions and if new tunes would be best to go along with this upgrade?