Downshift Speed Test

WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

To carry out this test, proceed as follows:

Shift into a lower gear than the gear used when carrying out the Slow Acceleration Test.
Drive at the engine RPM where the symptom occurs.
The symptom is engine speed related if duplicated while carrying out this test. This eliminates the tires, wheels, brakes and the suspension components as sources.
If necessary, repeat this test using other gears and neutral to verify the results.
If the source of the symptom has been identified as a result of this test, proceed to the appropriate article for further diagnosis and repair. If the source has not been identified, continue with the road test.