One problem related to transmission not go into gear has been reported for the 2000 Hyundai Elantra. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2000 Hyundai Elantra based on all problems reported for the 2000 Elantra.
There are two problems, I am not sure if they are related or not 1) car will not shift out of park if on an incline. In order to get it out of park, you must force the shifter. 2) car has problems with initial acceleration after a stop. Will not go into first gear, transmission will "thump" into gear. Transmission fluid level is adequate.