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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 977 (Four-Wheel Drive Systems (ESOF) -- F150 Pickup) >> Diagnosis And Testing >> Four-Wheel Drive Systems - Mechanical Shift >> Pinpoint Tests >> Pinpoint Test G: Straightline Driveline Wind-up >> Pinpoint Test G: STRAIGHTLINE Driveline Wind-Up

Pinpoint Test G: STRAIGHTLINE Driveline Wind-Up

WARNING: This page is about a different car, the 2005 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: 4x4 high/low (4H/4L) is not intended for driving on hard/dry surfaces.
  1. G1 VERIFY THE CONCERN 
    • Drive the vehicle and shift from 2H to 4H. There should be minimal wind-up in 4H mode during straight line maneuvers (wind-up in turns is normal; 4x4 high/low is not intended for driving on hard/dry surfaces).
    • Is excessive wind-up present? 
    • Yes  : GO to  G2.
    • No  : RETURN the vehicle to the customer. ADVISE about correct 4x4 system operation and normal vehicle behavior.
  2. G2 CHECK FOR MATCHING WHEEL AND TIRE SIZES 
    • Check the wheel and tire sizes.
    • Do the 4 wheel and tire sizes match? 
    • Yes  : GO to  G3.
    • No  : ADVISE the customer that 4x4 systems require 4 matched, correctly inflated, correctly maintained tires to operate correctly.
  3. G3 CHECK TIRE WEAR 
    • Check each of the 4 tires for wear.
    • Are the 4 tires worn evenly? 
    • Yes  : GO to  G4.
    • No  : ADVISE the customer that 4x4 systems require 4 matched, correctly inflated, correctly rotated tires to operate correctly.
  4. G4 CHECK TIRE INFLATION PRESSURE 
    • Check the inflation pressure in each tire. Refer to vehicle certification label.
    • Are the tire inflation pressures correct? 
    • Yes  : GO to  G5.
    • No  : ADJUST the tire pressure as necessary. TEST the vehicle for normal operation. ADVISE the customer that 4x4 systems require four matched, correctly inflated, correctly maintained tires to operate correctly.
  5. G5 CHECK THE FRONT AND REAR AXLE RATIOS 
    • Yes  : RETURN the vehicle to the customer and ADVISE about correct 4x4 usage and normal vehicle behavior.
    • No  : CHECK the vehicle identification label. INSTALL the correct axle(s). REFER to DRIVELINE SYSTEM-GENERAL INFORMATION .
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