All transmission complaints should be verified by road
testing the vehicle and attempting to duplicate the
customer's complaint. Knowing the exact conditions that
cause the symptom will allow you to accurately diagnose
problems. Many problems that appear to be
transmission problems may be caused by problems in the engine,
drive shaft, U-or CV joints, wheel bearings, wheel/tire
imbalance, or other conditions.
Make sure the so conditions are not the cause of the
problem before you begin to diagnose and
repair a transmission. Diagnosis becomes easy if you think about what
is happening in the transmission when the problem
occurs. If there is a shifting problem, think about the parts
that are being engaged and what these parts
are attempting to do.