Two problems related to transmission not go into gear have been reported for the 1999 Hyundai Elantra. The most recently reported issues are listed below.
While driving vehicle will not change gears and wouldn't increase in speed. Contacted dealership, cannot find problem.
While accelerating onto the highway and reaching a speed of 50 mph transmission began to lose power and eventually failed to change gears, causing vehicle to completely shut down. Cause unknown. Please give any further details.