Suspension issue?

I have a 2012. 4.6 crew cab that I bought in November. Today was my second oil change and my first tire rotation. I had an alignment done when I first bought it but it still pulled to the right. I switched the front wheels and it seemed to correct itself. Today while it was jacked up, I noticed that the driver's side sat lower then the passenger side. I looked around but did not noticed anything that stood out as broken or needing replacement. After rotating the tires, the truck now pulls really hard to the right. I'll switch the wheels tomorrow but is it a sign that something is wrong with the driver's side sitting lower? (Usually I search before posting, but in this case I did not know what to search for)

 

Bump
I've added a picture to show what happens when the truck is lifted. I didn't noticed anything broken, but I didn't do a thorough check. Any ideas?

 

The gas tank is on the drivers side which is also why, when getting an aftermarket lift, people have to lift the drivers side up a little more than the passenger side. I'm not positive that the gas tank weight is the reason for what you're seeing but that is my guess.

 

Thanks, but I don't think the gas tank would cause the wheel to sit like that.

 

Did you check the frame is level relative to the ground in they photo? 9/10 times I lift the truck up it isn't level relative to the ground

 

I didn't but I can next time. However, it did look like this when it was on jack stands too. those were both at the same height.

 

I'm not sure if that's a valid test. What you are checking is where the bump stop is on each side. Since that's not where the truck sits when there's weight on the tires I don't know if it's telling you anything. That being said it's possible that the strut or spring could have an issue. If one side is putting unusually more force that the other then it could pull. Also check the sway bar and it's connectors. It's job is to keep both front wheels even.

 

Its called the driver side lean. Some tundra has them. I have it on mine. Mine sits 1/2 lower on driver side. Thats because of the gas tank, fuel and battery.

 

Check also to see if there are shims on your front coil overs. That could cause the drivers side to be lower when you lift the front off the ground.

 

Jack it up and put jack stands under the frame and remove the jack (or release pressure like I do and leave in place for security). This with remove the gas tank from the equation and work from there.

If the pull changes when you rotate tires that would be a tire problem (shifted belt, etc.) and have nothing to do with a tire hanging lower.