My 99 had 1 extra leaf spring, I compared it to a couple other trucks just like mine to figure which spring was added, I finished pulling them earlier today , I am happy with the drop in the rear, but I notice some vibrations on the test drive I haven't had before....I crawled under the truck and double checked all the bolts when I got back....all tight...

Should I get an alignment now, I don't see anything that changed, but I want to make sure....
How is the rear aligned, I mean what is adjusted, if at all?

BEFORE

AFTER

 

It sure wouldn't hurt to have it checked.

 

What would or could they adjust if it was off?, just curious....

 

I wouldn't think lowering the rear such a small amount would affect anything up front, but you never know. I wouldn't think the toe or camber would change, but the caster might.

 

ok so nothing in the rear would or could change? But it could effect the front end alignment right? Thanks for your help....

 

Right, the rear should be fine. I'm not positive about it affecting the front end alignment.

 

Your pinion angle might be off now that you have lowered the rear. The vibration is most likely coming from your driveline.