One problem related to transmission not go into gear has been reported for the 2010 Jeep Wrangler. The most recently reported issues are listed below.
Jeep will not hold first gear in. Every time it is put into first gear, the shifter is kicked out. The clutch was pushed in completely when put into gear and the problem still occurs. The issue usually happens at about 5 mph and below and sometimes when completely stopped. This issue has nearly caused multiple accidents due to the inability to be able accelerate as needed. One of the "solutions" is to use second gear to take off and completely bypass the first gear which will speed up the wear on the clutch causing premature replacement.