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Home >> Lincoln >> 2018 >> MKZ Select, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 565 (Four-Wheel Drive Systems) >> Diagnosis And Testing >> Four Wheel Drive (4WD) Systems - 2-Speed Torque-On-Demand >> Pinpoint Tests >> Pinpoint Test S : Vehicle Pulsates Or Shudders In A Straight Line (STRAIGHTLINE Driveline Wind-Up) >> Notes

Pinpoint Test S : Vehicle Pulsates Or Shudders In A Straight Line (STRAIGHTLINE Driveline Wind-Up): Notes

WARNING: This page is about a different car, the 2017 Lincoln Navigator and 2017 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.

Normal Operation 

In order for the 4WD system to function correctly, tires and wheels must be the same size, be in good condition and the front and rear axle ratios must match.

This pinpoint test is intended to diagnose the following: 

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