I've disconnected the power steering lines several times when lowerin
subframes for transmission replacement, but cannot recall whether this i
advantageous on the '06 Sonata. Check your paperwork from th
transmission replacement. If there's a part number something lik
npnsteerfd, then it was replaced.
I don't really think whether it was replaced during transmissio
replacement is really the important question, though. How did the sho
determine you fluid was breaking down? What tests did they run t
determine this? Don't be afraid to ask these questions. What you'r
likely to find is that the technician sees it hasn't yet been done or tha
the fluid is dark in color.
Shops recommend fluid flushes and replacements because they're high profi
items. Service advisors and technicians typically get financial incentive
beyond their typical pay for these items. Check your owner's manual.
You'll see there's no maintenance interval for the power steering fluid.
So unless it's really gross, there's *no* good reason to change it.
I don't think I've recommended this repair even once on any vehicle.
will say, however, that some older GM vehicles had some steering problem
that fluid flushing will help compensate for or help prevent, so it's no
true that this service is *never* a good idea