Just swapped out my gearbox for a redhead and planning to do a flush. My question is this; the current power steering fluid is almost clear, maybe more engine oil colored. It is not RED/PURPLE like dexron III ATF fluid. I know its virtually impossible to say for sure what fluid this is BUT it definitely is not dexron III. With a new steering gearbox I definitely want to ensure I get the correct fluid in and dont want to worry about mixing synthetic or atf or non-synthetic. Should I just flush it with dexron III and call it good?