steering is hard to turn when trying to park, but not all the time. it will go on 2001 Ford F-250 Super Duty

easy at first but if i need to correct it a little et is very difficult to turn

by in Humble, TX on September 09, 2013
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1 answer
ANSWER by , September 09, 2013
seem to get more difficult with brakes applied? if so, steering pump and/or hydroboost unit may be getting weak.