I replaced my tie rod joints then took it in for the alignment everything is perfect. But when going down the road veers to the right. The alignment guy sai he would have to put shims in the spindles. I dont know what to do?

Yes the tires have been rotated

 

another not is to check ride hight at all four tires, if the rear springs are compressed more on one side it will change the location of the rear axle and make it drive to the opposite side. Have this issue with my truck sits about 3/4" lower on drivers side. look at the rear shackle on the springs to see if they are at the same angle.

 

I just got my alignment done along with 4 new Michelin's. Rides soo smooth for a 4x4, all the guy did was loosen some things and re tighten them.

 

What's the road crown like in your area?

 

Are shims a W250 thing? Your sig doesn't show what you have. I just did my D250 complete front end and I don't see the spindle being shimmed. Reminds me of my F150 that I redid the front end and Firestone kept me waiting 6 hours to tell me it would need shims that they couldn't get til the next week. I drove it a couple more months and took it to Goodyear. Their mechanic loosened the eccentric pin and rotated to alignment. Never had another problem. On a D250 alignment is set with tie rod adjustment and rotating the upper control arm eccentric I think.