Front end - feels loose?

Not sure if this makes sense, but sometimes when I hit a bump in the road it feels like the front end isn't real tight? I came out of an F150 and never felt this before. It was always super tight no matter what kind of bump I hit. I have a leveling kit on there and not sure if this may be the problem. I bought it used (15k miles) and not sure if the kit might not be installed correctly.

Any suggestions?

 

One more thing, I have LT 305 55 20's on there and being a 10 ply tire that this may be the issue.

 

Probably the lift and heavy tires. Know anyone else with a lifted tundra you could ride with to compare?

 

Had my alignment done right after I bought it. There was a slight tilt to the right in the steering wheel so I had the tires rotated and balanced and am alignment done.

 

Yea TruckyTruck, I rode in my buddies 15 crewmax 4x4 but I didn't drive it. His was definitely much much smoother.