At times the transmission ds not shift from 2 to 3 or 3 to 4 gears. Causes the engine RPM to reach red level. Have to pull over turn off vehicle and restart for the transmission to shift again. This is suppose to be a lifetime transmission and not need any maintenance. It seems to be a common problem on many forums for this particular transmission. Or it jumps into gear instead of the smooth shifting that it is suppose to do. Many people seem to be having the same issues.