Symptom Chart - Manual Shift
WARNING: This page is about a different car, the 2019 Ford F-550 Super Duty, 2019 Ford F-450 Super Duty, 2019 Ford F-350 Super Duty, and 2019 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
| Symptom | Possible Sources | Action |
|---|---|---|
| The Four-Wheel Drive (4WD) indicators do not operate correctly | Wiring, terminals or connectors Mode Indication Switch (MIS) IPC |
GO to Pinpoint Test A |
| The vehicle does not shift between 2H and 4H modes correctly | Shift lever assembly Transfer case internal components Manual hublocks Front axle assembly |
GO to Pinpoint Test B |
| The vehicle does not shift between 4H and 4L modes correctly | Shift lever assembly Transfer case internal components Transfer case internal components |
GO to Pinpoint Test C |
| The transfer case jumps out of gear | Shift lever detent Mode Indication Switch (MIS) Shift lever assembly Transfer case |
GO to Pinpoint Test D |
| Vehicle pulsates or shudders in a straight line (straight line driveline wind up) | Unmatched tire sizes Unequal amounts of tire wear Unequal tire inflation pressures Unmatched front and rear axle ratios Front and rear axles |
GO to Pinpoint Test E |
| Clunking noise during transfer case engagement | Vehicle speed Torque to front axle |
MAKE SURE that the vehicle is shifted at a speed below 5 km/h (3 mph), all tires and wheels are the same size and that the inflation pressures are correct. Also, avoid shifting the transfer case while turning the vehicle. |
| Transfer case (4WD system) makes noise when driving | Unequal tire inflation pressures Unmatched tire sizes Unequal amounts of tire wear Transfer case internal components Fluid level |
MAKE SURE that all tires and wheels are the same size and that the inflation pressures are correct CHECK tire tread wear to see if there is more than 1.52 mm (0.06 in) difference in tread wear between front and rear. INTERCHANGE one front and one rear wheel. ROAD TEST again. OPERATE the vehicle in all transmission gears. If there is noise with the transmission in NEUTRAL or in some gears and not others, REMOVE and REPAIR the transmission. REFER to: Diagnosis By Symptom . REFER to: Diagnosis By Symptom . If there is noise in all gears, DISASSEMBLE the transfer case. REFER to: Transfer Case . CHECK the planetary gears, bearings, upper and lower drive sprockets and drive chain for damage. INSTALL new parts as necessary. FILL with the specified fluid. REFER to: Transfer Case . |
| Unable to duplicate customer concern | 4WD system and/or related components | CARRY OUT the Manual Shift-On-Stop (MSOS) Functional Test. GO to Pinpoint Test F |