One problem related to transmission not go into gear has been reported for the 2002 Toyota 4Runner. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2002 Toyota 4Runner based on all problems reported for the 2002 4Runner.
After noticing a strong gear oil odor and seeing the actual gear oil on the back the of the vehicle I was alarmed to find out that the rear axle housing had rust perforating the rear of the housing. Once the housing was checked by a certified mechanic and turned away due to fear of destroying the housing, I removed the vehicle from the road.