Transmission problem..?
 

Hi,

I have a 2000 Elantra. The car has problems with loosing power when I think it reaches the 4th gear. Just when the car hits about 70KM/Hr the car looser power as if the transmission is disconnected. This happens at most times but sometiems does not. When I turn the Overdrive button off, the car runs fine, but I think runs at a higher RPM but lower gear.

If any one can help with some suggestions it would be greatly appreciated.

Thanks