1997 Hyundai Accent Q&A

1997 Hyundai Accent Question: my transmission is slipping is there a sensor or clutch solinoid

I can drive in low gears 1&2 but it won't go in drive the engine just revs real hi -
Answer 1
do u have a ck eng light on? -
Comment 1
yes -
Comment 2
yes it has been on since i've owned the car -
Comment 3
HAVE CODES SCANNED AT AAMCO FOR FREE AND POST THE CODES -