Buick Encore: Vibration Diagnosis and Correction
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SPECIFICATIONS
TIRE AND WHEEL RUNOUT SPECIFICATIONS
Tire and Wheel Runout Specifications
DIAGNOSTIC INFORMATION AND PROCEDURES
VIBRATION DIAGNOSIS, STARTING POINT, AND CORRECTION
The information con
Test Description
The numbers below refer to the step numbers on the diagnostic table.
5
Obtaining rotational speed for the components rotating at tire/wheel speed is
critical to systematically
elimin
Test Description
The numbers below refer to the step numbers on the diagnostic table:
2
This test will determine the effect of turning input on the vibration.
6
This test will determine the effect of
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Definitions and abbreviations
Throttle Positions
Engine Braking
A condition where the engine is used to slow the vehicle by manually
downshifting during a zero throttle
coastdown.
Full Throttle Downshift
A quick apply of the accelerator pedal to its full travel, forcing a
downshift.
Heavy Throttle
Manual shift detent lever with shaft position witch assembly replacement
Special Tools
DT-41229 Manual Shaft Pin Installer
For equivalent regional tools, refer to Special Tools .
Removal Procedure
Remove the engine coolant fan shroud. Refer to Engine Coolant Fan Shroud
Replacement (2H0) ,
Engin