97 Toyota Avalon 182K--wobbly steering. Checked the PS fluid 3 days ago-it was orange. Extracted fluid and replaced with Dex VI and drove. Did this 3 times. Dex VI is red. Checked PS fluid again today--it was orange. Mechanic says the rack needs replacing--fair enough, it was replaced 96,000 miles ago (along with the PS pump), but why would this change the color of the PS fluid? No evidence of any leaks and no noise from the PS pump. PS fluid was replaced 14 months ago... I suppose I should get the pump changed along with the rack??