4 Wheel Drive/SUVs: 2001 Highlander - Front Rattle, toyota highlander, sway bar end links

Question
Dear Adam;
  I hope you are able to help.  I have a 2001 Toyota Highlander all-wheel drive (all the time) with over 100K miles.  Every time I go over railroad tracks or bumps in the road; my husband and I hear a rattling from the front of the truck.  We've brought it to the dealer for repair twice and each time they say they can't hear or find the rattling.  What do you think it might be?  What do you think the cost would be to repair?

Answer
Nicole, sway bar end links go bad in alot of 4x4 vehicles all the time , and they dont cost too much to replace, I would suggest taking it to a smaller independent shop that you trust and have them take a look at it, I just fixed a nissan the other day that was doing the same thing thanks ADAM