My 2016 Jeep Sahara has a hard time shifting from second to third gear. I always have to briefly let off the gas for it to shift into third gear. I live up around 10,000 ft so that may be an issue. although It doesn't seem to bother my Escalade. The transmission is at the proper level and it only has 20k on it. She also has a 4" lift and 35's on her.