My husband bought this car @ a parking lot dealership, after owning the
thing for 7 days the Overdrive started to act up and it appeared that the
car was not going into 4 gear.  We took the car back and they indicated
that since the mileage had hit 50K miles that the transmission fluid
should be flushed; so we got that gone.  The car appeared to be working as
if nothing had happened until 30 days after that when my husband was
driving on I-10 in AZ and the engine began to rev up uncontrolablly, but
the overdrive was still working.  The hubby turned off the overdrive
switch off and the problem stopped.  Then the Check Engine light kept
going on and off.  We finally took it in to a repair shop and they told us
that the computer was not reading the correct codes and that we needed to
get them erased and reuploaded (if that's what you call it). Then went in
to the Hyundai Dealership in Petre Phoenix, Az and they said that the
transmission may have to be replaced, I think it's because I'm a woman and
they want to make a buck.  I spoke with another repair tech and he said
that I have to get the transmission fluid drained, not flushed and have
the wires inspected.  So what are your thoughts regarding whether it's the
tranny, computer codes or overdrive switch not working?
To the date the car will not go into 4th gear when it is driven on the
highway, so we are forced to take side roads.