Power Transfer Unit (PTU) Overhaul

Power Transfer Unit (PTU) - Overhaul 

Courtesy of FORD MOTOR COMPANY	Slide Hammer 100-001
Courtesy of FORD MOTOR COMPANY	Holding Fixture, Drive Pinion Flange 205-126
Courtesy of FORD MOTOR COMPANY	Handle 205-153
Courtesy of FORD MOTOR COMPANY	Remover, Halfshaft 205-241
Courtesy of FORD MOTOR COMPANY	Installer, Front Axle Bushing
Courtesy of FORD MOTOR COMPANY	Installer, PTU Linkshaft Seal
Courtesy of FORD MOTOR COMPANY	Installer, Parking Brake Bearing 206-040
Courtesy of FORD MOTOR COMPANY	Holding Fixture, Transmission 307-003
Courtesy of FORD MOTOR COMPANY	Remover, Output Flange 307-523
Courtesy of FORD MOTOR COMPANY	Remover, Transfer Case Bearing 308-125
Courtesy of FORD MOTOR COMPANY	Installer, Shaft Bearing Cup
Courtesy of FORD MOTOR COMPANY	Installer, PTO Drive Gear Outer Oil Seal
Courtesy of FORD MOTOR COMPANY	Installer, Halfshaft Oil Seal
Courtesy of FORD MOTOR COMPANY	Remover and Installer, PTU Input Shaft Seal

Flat-Bladed Screwdriver

Slide Hammer

Slide Hammer Dent Puller

Spatula

Item	Specification
Motorcraft® Silicone Brake Caliper Grease and Dielectric Compound XG-3-A	ESE-M1C171-A
Motorcraft® SAE 75W-140 Synthetic Rear Axle Lubricant XY-75W140-QL (US); CXY-75W140-1L (Canada)	WSL-M2C192-A and GL-5
Ultra Silicone Sealant TA-29	-

All Vehicles 

1. 1.
   
   Remove the PTU (Power Transfer Unit). See REMOVAL .

1. 2.
   
   Using the special tool, secure the PTU (Power Transfer Unit) to the bench. Special Tool: 307-003 Holding Fixture, Transmission

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1. 3.
   
   Inspect the case exterior for cracks.

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1. 4.
   
   Remove the temperature sensor clip bracket.

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1. 5.
   
   
   NOTE: The following instruction will prevent the 308-125 (T87P-7120-D) from opening too far which would make removing the intermediate shaft seal deflector difficult.

   Place a 16 mm (5/8 in) washer on the special tool as shown. Special Tool: 308-125 Remover, Transfer Case Bearing

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1. 6.
   
   
   NOTE: The intermediate shaft seal deflector may break when removed. Remove all foreign materials from the PTU before continuing with the repair.

   Using the special tools, remove and discard the halfshaft deflector. Special Tool: 205-241 Remover, Halfshaft Special Tool: 308-125 Remover, Transfer Case Bearing Equipment: Slide Hammer

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1. 7.
   
   Using the special tool, remove and discard the halfshaft intermediate shaft seal and alignment washer. Special Tool: 205-241 Remover, Halfshaft Special Tool: 308-125 Remover, Transfer Case BearingEquipment: Slide Hammer

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1. 8.
   
   Using the special tools, remove and discard the RH cover seal. Special Tool: 205-241 Remover, Halfshaft Equipment: Slide Hammer

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1. 9.
   
   Remove and discard the compression seal. Special Tool: 205-241 Remover, Halfshaft Equipment: Slide Hammer

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1. 10.
   
   
   NOTE: Do not press the seals lower than specified. Excessive force will damage the bearing below the seals.
   NOTE: Both seals will need to be pressed lower into the transfer case input shaft opening to break the seals outer sealant loose from the transfer case.
   NOTE: There is approximately a 5 mm (0.196 in) air gap between both seals and approximately 1 mm (0.039 in) air gap between the inner seal and the bearing race.

   Using the special tool, press the outer seal downward until the lower seal contacts the bearing race. Special Tool: 206-040 Installer, Parking Brake Bearing

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1. 11.
   
   Position the special tool above the PTU input shaft opening. Special Tool: 308-777 Remover and Installer, PTU Input Shaft Seal

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1. 12.
   
   Insert the special tool into one of the screw guide holes. Press the special tool downward until the shoulder of the punch touches the screw guide. Special Tool: 308-777 Remover and Installer, PTU Input Shaft Seal

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1. 13.
   
   
   NOTE: Do not overtighten the screws. Turn the 308-777 /3 until they are seated into the screw guide holes.

   Install the special tool into the screw guide hole. Special Tool: 308-777 Remover and Installer, PTU Input Shaft Seal

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1. 14.
   
   Insert the special tool into the opposing screw guide hole. Press the special tool downward until the shoulder of the punch touches the screw guide. Special Tool: 308-777 Remover and Installer, PTU Input Shaft Seal

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1. 15.
   
   Install the special tool into the screw guide hole. Special Tool: 308-777 Remover and Installer, PTU Input Shaft Seal

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1. 16.
   
   Using the special tools, remove and discard the 2 input shaft seals. Special Tool: 308-777 Remover and Installer, PTU Input Shaft Seal Special Tool: 100-001 Slide Hammer

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Vehicles without PTU cooler 

1. 17.
   
   Remove the PTU temperature sensor heat shield bolts and the heat shield.

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1. 18.
   
   Remove the PTU temperature sensor and the temperature sensor wiring retainer clip.

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1. 19.
   
   Remove the drain plug.

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1. 20.
   
   Remove the fill plug.

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Vehicles with PTU cooler 

1. 21.
   
   Remove the PTU temperature sensor heat shield bolts and the heat shield.

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1. 22.
   
   If equipped with PTU cooling, remove the PTU temperature sensor.

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1. 23.
   
   If equipped with PTU cooling, remove the PTU cooler housing bolts and PTU cooler housing.

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1. 24.
   
   If equipped with PTU cooling, remove the PTU cooler housing gasket and discard.

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All Vehicles 

1. 25.
   
   Remove the PTU cover bolts.

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1. 26.
   
   Remove the PTU cover. Equipment: Flat-Bladed Screwdriver

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1. 27.
   
   Remove the ring gear assembly.

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1. 28.
   
   Remove the idler gear shaft and the idler gear assembly

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1. 29.
   
   Remove and discard the washer.

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1. 30.
   
   Remove the input gear assembly.

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1. 31.
   
   Index mark the output pinion flange to the pinion shaft.

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1. 32.
   
   Using the special tool, hold the output pinion flange. Remove and discard the pinion nut. Special Tool: 205-126 Holding Fixture, Drive Pinion Flange

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1. 33.
   
   Using the special tool, remove the output pinion flange. Special Tool: 307-523 Remover, Output Flange

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1. 34.
   
   Remove and discard the output shaft seal.

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1. 35.
   
   Remove the oil slinger.

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1. 36.
   
   Remove the outer pinion bearing.

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1. 37.
   
   Remove and discard the collapsible spacer.

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1. 38.
   
   Remove the pinion gear.

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1. 39.
   
   Inspect the PTU ring gears and bearing for damage. INSTALL a new PTU if damage is present.

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1. 40.
   
   Inspect the PTU input gear and bearings for damage. INSTALL a new PTU if damage is present.

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1. 41.
   
   Inspect the PTU pinion gear and bearing for damage. INSTALL a new PTU if damage is present.

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1. 42.
   
   Inspect the PTU idler gear and bearing for damage. Replace as necessary.

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1. 43.
   
   Inspect the PTU idler gear shaft for damage. Replace as necessary.

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1. 44.
   
   Inspect the PTU bearing races and thrust surface for damage. INSTALL a new PTU if damage is present.

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1. 45.
   
   Inspect the PTU outer pinion bearing race for damage. INSTALL a new PTU if damage is present.

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1. 46.
   
   Inspect the PTU cover bearing and bearing race for damage. INSTALL a new PTU if damage is present.

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1. 47.
   
   Throughly clean the internal components. Use a soft bristle brush to remove contamination and deposits. Allow parts to air dry. Inspect the components for damage, replace as necessary.

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1. 48.
   
   Remove the contamination and deposits from the PTU housing and cover using a plastic scraper. Clean the PTU housing and cover using a soft bristle brush to remove the contamination. Clean any remaining lip seal coating that may still be present on the housing or cover bores with a wire brush. Make sure the vent fitting and housing pockets are clean and clear.

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1. 49.
   
   Clean the PTU case and cover flange sealing surfaces. See ENGINE SYSTEM - GENERAL INFORMATION .

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1. 50.
   
   To begin assembly, lightly coat the output shaft bearings in clean axle lubricant. Install the PTU output shaft into the PTU case. Material: Gear/Transmission Fluid - SAE 75W-140 WSL-M2C192-A

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1. 51.
   
   Install the new collapsible spacer.

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1. 52.
   
   Lightly coat with clean axle lubricant and install the outer pinion bearing. Material: Gear/Transmission Fluid - SAE 75W-140 WSL-M2C192-A

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1. 53.
   
   Install the oil slinger.

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1. 54.
   
   Using the special tool, install the output shaft seal. Special Tool: 308-430 Installer, PTO Drive Gear Outer Oil Seal

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1. 55.
   
   
   NOTE: Install a new output pinion flange and deflector if the output shaft seal mating surface is damaged.

   Inspect the output pinion flange and deflector for damage, replace as necessary.

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1. 56.
   
   
   NOTE: Install the output pinion flange to engage the spline as previously marked.

   Install the output pinion flange.

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1. 57.
   
   Using the special tool to hold the output pinion flange, install a new pinion flange nut. Special Tool: 205-126 Holding Fixture, Drive Pinion Flange Torque: 142 N.m

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1. 58.
   
   Lightly coat the input shaft bearings and gear with clean axle lubricant. Install the input shaft into the PTU case. Material: Gear/Transmission Fluid - SAE 75W-140 WSL-M2C192-A

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1. 59.
   
   
   NOTE: The kit may include a subassembly of the idler gear, bearings, shaft and thrust washer retained by a plastic ring. Remove and discard the ring.

   Lightly coat the idler gear, bearings, shaft and thrust washer with clean axle lubricant. Insert the 2 new idler bearings in the idler gear bore (no orientation required). Insert the new idler shaft through bearings. Coat the thrust face in the PTU case with clean axle lubricant and install the idler gear subassembly. Material: Gear/Transmission Fluid - SAE 75W-140 WSL-M2C192-A

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1. 60.
   
   Lightly coat the ring gear shaft and bearings with clean axle lubricant. Install the ring gear shaft into the PTU case. Material: Gear/Transmission Fluid - SAE 75W-140 WSL-M2C192-A

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1. 61.
   
   Orient the idler shaft "D" by lightly fitting the cover over it and rotating to the correct position. Remove the cover.

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1. 62.
   
   Make sure that the mating faces are clean and free of foreign material. See ENGINE SYSTEM - GENERAL INFORMATION .

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1. 63.
   
   
   NOTE: If the PTU cover is not installed within 10 minutes of application of the silicone, new sealant must be applied.

   Apply a continuous 3-4 mm bead of sealant to the inside of the cover flange surface. Make sure there are no gaps in the sealer. Allow to set for 5-10 minutes before installing the cover. Material: Silicone Sealant -

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1. 64.
   
   Noting the two dowels and the idler gear shaft orientation, carefully install cover and hand start the bolts. Tighten the bolts in 2 stages per sequence shown. Torque: Stage 1: 37 N.m Stage 2: 47 N.m

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1. 65.
   
   
   NOTE: Position the inner seal above the PTU input shaft opening with the spring facing toward the PTU.

   Using the special tools, install the seal. Special Tool: 205-153 Handle Special Tool: 308-777 Remover and Installer, PTU Input Shaft Seal

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1. 66.
   
   
   NOTE: Position the outer seal above the PTU input shaft opening with the spring facing away from the PTU.

   Using the special tools, install the seal. Special Tool: 205-153 Handle Special Tool: 308-777 Remover and Installer, PTU Input Shaft Seal

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1. 67.
   
   Install the new compression seal. Special Tool: 205-153 Handle Special Tool: 308-777 Remover and Installer, PTU Input Shaft Seal

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1. 68.
   
   Special Tool: 308-777 Remover and Installer, PTU Input Shaft Seal cover seal. Special Tool: 308-221 Installer, Shaft Bearing Cup Special Tool: 308-431 Installer, Halfshaft Oil Seal Special Tool: 205-153 Handle

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1. 69.
   
   Place the intermediate shaft seal on the special tools with the spring side facing away from the tool. Special Tool: 205-153 Handle Special Tool: 205-883 Installer, PTU Linkshaft Seal

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1. 70.
   
   Using the special tools, install the intermediate shaft seal. Special Tool: 205-153 Handle Special Tool: 205-883 Installer, PTU Linkshaft Seal

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1. 71.
   
   Place the alignment washer on the special tool. Special Tool: 205-153 Handle Special Tool: 205-883 Installer, PTU Linkshaft Seal

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1. 72.
   
   
   NOTE: Do not use force when installing the alignment washer or damage to the washer can occur.

   Using the special tool, install the alignment washer by hand, pushing it in until it bottoms against the seal. Special Tool: 205-153 Handle Special Tool: 205-883 Installer, PTU Linkshaft Seal

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1. 73.
   
   
   NOTE: Do not overheat (melt) the seal deflector. Monitor the temperature of the deflector with a suitable temperature measuring device, such as a digital temperature laser or infrared thermometer, while heating. Do not allow the temperature to exceed 100° C (212° F). Overheating will damage the deflector. If the deflector is damaged, a new deflector must be used.
   NOTE: As an alternative method to heating the seal deflector, place the deflector in boiling water for 3 to 5 minutes. Dry off the deflector and install.

   Position the deflector on the special tool using silicone brake caliper grease and dielectric compound to retain it to the installer. Using a suitable heat gun, heat the back of the tool to a minimum of 71° C (160° F) and a maximum of 93° C (200° F) by concentrating the heat across the back of the installer while rotating the tool. Once the optimum temperature is achieved on the tool, move the heat gun to the front of the tool and heat the inside of the deflector where it snaps onto the PTU shaft until the temperature of the deflector is a minimum of 93° C (200° F) to a maximum of 100° C (212° F). Special Tool: 205-346 Installer, Front Axle Bushing Special Tool: 205-153 Handle Material: Grease - Silicone ESE-M1C171-A

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1. 74.
   
   Using the special tools, install the intermediate shaft deflector. Special Tool: 205-346 Installer, Front Axle Bushing Special Tool: 205-153 Handle

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1. 75.
   
   Make sure the deflector is completely seated all the way around and there are no cracks on the face. The deflector is correctly installed when the face of the deflector is recessed 3-5 mm (0.12-0.20 in) into the pocket all the way around.

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1. 76.
   
   Install the PTU drain plug. Torque: 12 N.m

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Vehicles with PTU cooler 

1. 77.
   
   Install the PTU cooler housing gasket.

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1. 78.
   
   Clean the PTU cooler housing.

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1. 79.
   
   Install the PTU cooler housing and the PTU cooler housing bolts. The PTU temperature sensor, heat shield and bolts will be installed after the fluid fill. Torque: 12 N m

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Vehicles without PTU cooler 

1. 80.
   
   
   NOTE: Install a new O-ring before installing the PTU temperature sensor.

   Using a new O-ring, install the PTU temperature sensor and the temperature sensor wiring retainer clip. Torque: 14 N.m

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1. 81.
   
   Install the PTU temperature sensor heat shield and the bolts. Torque: 12 N.m

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All Vehicles 

1. 82.
   
   Install the temperature sensor clip bracket. Torque: 10 N.m

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1. 83.
   
   Install the PTU. See INSTALLATION .