13 with 3" Level and rancho arms. Got my alignment and this is what it is. I gave them the rancho arm specs to compare and figure it out. Looks like they used the "modified suspension " specs. Truck slowly drifts right and when it hits a bump it drifts more right while gradually turning the wheel. What's going on?

 

That is the caster slightly out of spec. You'll need to get that caster spec to get it to drive the way you want it. May take some fiddling.

You didn't mention if you installed a castor/camber kit?

Also, those numbers they mention are guidelines to get you started.

 

I thought it was supposed to be about .5 more fore road crown? Yes it has the spc cam kits.

 

You may need to have it higher. Tell the alignment shop to adjust the caster more then see how it drives.

Again, it's one of those things, you have now changed the front end geometry. Takes some trial and error.

Just be cautious that you could end up with odd tire wear from adjusting the caster too aggressively.

 

I swapped some old worn out lift arms for the ranchos. They only adjusted my toe to keep the cost down. Otherwise it would have been double the cost. I'll have to see how it is for a bit. If it really bugs me I'll have to go back. I just keep bugging them for alignments. So I feel like they just don't care ya know lol.im tired of spending money and I just want it to drive correct. I'm very picky, if I had my own machine I would've perfected it.

 

For what you've got going on, you need a shop that will do a full alignment.

The shops in my area always check and adjust (if possible) everything for the same cost. With the exception for adding shim kits and what not.

I got a tool that I can do toe in/out myself. But I don't rely on that because tires are expensive. It's good to be able to drive it for a few days till I can get it to someone that has a computerized alignment system.