I have a '99 Hyundai Elantra with a 1.8L engine and automatic transmission. The car tries to shift into overdrive and slips the majority of the time. I have noticed that when it DOES shift into overdrive, that letting up off the throttle causes it to slip out again.
I took it to a transmission shop and paid them to diagnose it, and they told me that they confirmed the computer is sending the signal to shift, so it is an internal problem. I just changed the oil and filter for the transmission and it appears to have helped but only a little, overdrive still slips out more than 50% of the time. Also, the check engine light came on. I'm going to scan the check engine codes tomorrow but I'm not sure how this would have anything to do with the transmission.
have the same problem?
Monday, October 3rd, 2011 AT 5:26 AM