Ford Escape Manuals

Ford Escape: Power Transfer Unit / Diagnosis and Testing - Power Transfer Unit

Inspection and Verification

  1. Verify the customer concern.
  1. Visually inspect for obvious signs of mechanical damage.

  Visual Inspection Chart


Mechanical
  • Power transfer unit
  • Halfshafts and CV joints
  • Driveshaft and U-joints
  • Wheel/tire size and brand
  • Matching tire size and brand
  • Tire pressure
  1. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step
  1. If the cause is not visually evident, verify the symptom and refer to the Symptom Chart.

Symptom Chart

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).

In most circumstances the PCM sets a DTC to help guide with diagnostics. Refer to the DTC Chart before using the Symptom Chart. The Condition column lists the vehicle condition. The Possible Sources column lists a detailed vehicle condition. The Action column lists the action to be performed to determine the cause of the condition. Each action lists the components that can cause the system and the individual components in that system. The components are listed in order of disassembly. Use the list of components and the required action to focus on disassembly inspections for the root cause of the concern.

Symptom Possible Sources Action
  • PTU Bearing noise during Disconnected mode
  • Fluid level
  • PTU Input shaft support bearings
  • FILL with the correct type and amount of lubricant.
  • REMOVE PTU, DISASSEMBLE and INSPECT input shaft bearings.
  • PTU Bearing noise during Connected Mode – Either with or without RDU activation.
  • Fluid level
  • PTU Ring gear shaft bearings
  • PTU pinion gear / output shaft bearings
  • FILL with the correct type and amount of lubricant.
  • REMOVE PTU, DISASSEMBLE and INSPECT input shaft bearings.
  • Ratcheting or clicking type noise during Connecting or Disconnecting modes.
  • PTU input shaft dog clutch teeth worn or damaged
  • PTU dog clutch collar teeth worn or damaged
  • REMOVE PTU, DISASSEMBLE and INSPECT input shaft bearings.
  • No torque available at the rear drive shaft / Driveshaft does not rotate in Connected Mode
  • Shift fork worn or broken
  • Connecting sleeve to input shaft splines worn or damaged
  • Dog clutch worn or damaged
  • Ring and pinion teeth worn or broken
  • REMOVE and INSPECT PTU Actuator Motor.
  • REMOVE PTU and INPSECT connecting sleeve, dog clutch, and gears.
  • Leaking automatic transmission fluid from right hand side
  • Power transfer unit intermediate shaft seal
  • INSTALL a new intermediate shaft.
  • Leaking automatic transmission fluid from left hand side
  • Transmission right hand differential seal and PTU to transmission compression seal
  • INSTALL new seals.
    REFER to: Halfshaft Seal RH (307-01A Automatic Transmission - 8-Speed Automatic Transmission – 8F35/8F40, Removal and Installation).
  • Leaking gear lubricant from right hand side
  • Power transfer unit input shaft seal – RH & intermediate shaft bearing to PTU O-Ring
  • INSTALL new seals.
  • Leaking gear lubricant from left hand side
  • Power transfer unit input shaft seal – LH and PTU to transmission compression seal
  • INSTALL new seals.
  • Leaking gear lubricant from the seals
  • The power transfer unit vent is plugged (located on top of the power transfer unit)
  • Damaged seals
  • INSTALL a new power transfer unit vent
  • REPLACE the leaking seal. Refer Removal and Installation procedures in this section.
  • Automatic transmission fluid leaking into PTU or PTU gear lubricant leaking into transmission
  • Connecting sleeve to input shaft O-Ring
  • INSTALL new seals.

Inspection of the seal's mating journal should be performed every time a seal is replaced. The mating part/journal should be replaced if it has any of the following conditions: Radial wear groove that is felt by running a finger nail across where the seal lip runs. Scratches, pitting, galling, nicks or other shaft damage under or near where the seal lip runs. Discoloration or coked oil on the shaft where the seal lip runs. Shaft corrosion under or near where the seal lip runs. Sharp edges or burrs on the shaft lead in chamfer. NEVER use emery cloth on journal finishes, replace the part.

    Description and Operation - Power Transfer Unit - Overview

    Power Transfer Unit The Power Transfer Unit (PTU) is a gearbox that attaches to the transmission. The PTU directs power from the transmission differential case through a dog clutch to a hypoid ring gear...

    General Procedures - Power Transfer Unit Draining and Filling

    Materials Name Specification Motorcraft® SAE 75W-85 Premium Synthetic Hypoid Gear LubricantXY-75W85-QL WSS-M2C942-A  Draining With the vehicle in NEUTRAL, position it on a hoist...

    Other information:

    Ford Escape 2020-2022 Owners Manual: Connected Vehicle Data


    The modem has a SIM. The modem was enabled when your vehicle was built and periodically sends messages to stay connected to the cell phone network, receive automatic software updates and send vehicle-related information to us, for example diagnostic information...

    Ford Escape 2020-2022 Service Manual: Removal and Installation - Rear Brake Flexible Hose


    Removal   WARNING: Service actions on vehicles equipped with electronic brake booster and electronic parking brakes may cause unexpected brake application, which could result in injury to hands or fingers. Put the brake system into service mode prior to servicing or removing any brake components...

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