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Home >> Mercedes Benz >> 2025 >> eSprinter Base, _NA_ >> Repair and Diagnosis >> External Pages >> Different car >> Section 2340 (Transfer Case - Four-Wheel Drive (4WD) System - Diagnostics -- F250-F550 Super Duty) >> Diagnostic Tests >> Four Wheel Drive (4WD) Systems - Electronic Shift >> Pinpoint Tests >> Pinpoint Test N: Straight-line Driveline Wind Up >> Pinpoint Test N: Straight-Line Driveline Wind Up

Pinpoint Test N: Straight-Line Driveline Wind Up

WARNING: This page is about a different car, the 2009 Ford Pickup, 2009 Ford F550 Super Duty, 2009 Ford F450 Super Duty, and 2009 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: 4X4 High or 4X4 Low is not intended for driving on hard/dry surfaces.
  1. N1 VERIFY THE CONCERN 
    • Drive the vehicle and shift from two wheel drive high (2WD) to four wheel drive high (4X4 High). There should be minimal wind-up in 4X4 High mode during straight line maneuvers, (wind-up in turns is normal; 4X4 high/4X4 low is not intended for driving on hard/dry surfaces).
    • Is wind up present? 
    1. YES  : Go to  N2.
    2. NO  : RETURN the vehicle to the customer and ADVISE about correct 4WD usage and normal vehicle behavior.
  2. N2 CHECK FOR MATCHING WHEEL AND TIRE SIZES 
    • Check each of the 4 tire/wheel sizes.
    • Do the 4 wheels and tires match? 
    1. YES  : Go to  N3.
    2. NO  : ADVISE the customer that 4WD systems require 4 matched, correctly inflated and correctly maintained tires to operate correctly.
  3. N3 CHECK TIRE WEAR 
    • Check each of the 4 tires for wear.
    • Are the 4 tires worn evenly? 
    1. YES  : Go to  N4.
    2. NO  : ADVISE the customer that 4WD systems require 4 matched, correctly inflated and correctly maintained tires to operate correctly.
  4. N4 CHECK TIRE INFLATION PRESSURE 
    • Check the inflation pressure in each tire. Refer to vehicle certification label.
    • Are the tire inflation pressures correct? 
    1. YES  : Go to  N5.
    2. NO  : ADJUST the tire pressure as necessary. TEST the vehicle for normal operation. ADVISE the customer that 4WD systems require 4 matched, correctly inflated, correctly maintained tires to operate correctly.
  5. N5 CHECK THE FRONT AND REAR AXLE RATIOS 
    1. YES  : RETURN the vehicle to the customer and ADVISE about correct 4WD system operation and normal vehicle behavior.
    2. NO  : CHECK the vehicle identification label. INSTALL the correct axle(s). REFER to DRIVELINE SYSTEM - GENERAL INFORMATION article.
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