Is the check engine light on, does it complete shifting through all four gears, and is the shifting more soft/harsh then normal?
March, 26, 2011 AT 6:57 PM
No check engine light on. Sometimes it will shift to 4th but not all the time, depends on speeed and rpm. The shifting sounds normal.
March, 27, 2011 AT 3:53 PM
Check and clean the mass air flow sensor hot wires, especially if it has an aftermarket oiled air filter(e.G. K&N). If it were possible, I would recommend checking and clearing the shift adapts, that would require a scan tool. I will include a general diagnostic chart for inaccurate shift points.