Torque value

Tiny
DERBYKID
  • MEMBER
  • 2012 FORD EXPLORER
  • 3.0L
  • V6
  • AWD
  • AUTOMATIC
  • 113,000 MILES
What is the torque specification for the PTU output shaft flange nut?
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Sunday, June 11th, 2017 AT 9:09 AM

7 Replies

Tiny
STEVE W.
  • EXPERT
52-54 ft. Lb.
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Monday, June 12th, 2017 AT 6:39 AM
Tiny
DERBYKID
  • MEMBER
Thanks for the info Steve. Just to be sure though, there are 4 bolts that connect the drive shaft to the PTU which are torqued at 52 ft lbs. The PTU output shaft flange nut is a single nut which holds the planetary gear inside the PTU up against the bearing. If it is to tight it will crush a collapsible spacer.
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Monday, June 12th, 2017 AT 7:04 AM
Tiny
STEVE W.
  • EXPERT
OK you want the output shaft pinion nut torque. There isn't a number for that, you actually need to measure the amount of torque it takes to rotate the shaft while it is installed and assembled. Then you install the new crush sleeve and tighten the nut until it takes the same amount of torque to rotate the shaft.

From Ford -
NOTE: Rotational torque of the Power Transfer Unit (PTU) rear output shaft flange must be measured and recorded using a Nm (lb-in) torque wrench for correct pinion bearing preload when reassembled. This will be the torque-to-turn measurement.

Using a suitable torque wrench, measure and record the rotational torque of the Power Transfer Unit (PTU) output shaft.

Now you remove the flange and replace the worn parts and crush sleeve, then

Install the output pinion flange.

NOTICE: Refer to the rotational torque previously recorded with the Nm (lb-in) torque wrench. Tighten the pinion nut in small increments until it is within 0.3 Nm (3 lb-in) of the reference measurement. If 0.3 Nm (3 lb-in) is exceeded, then the collapsible spacer will be damaged and a new collapsible spacer will be required.

However in the PTU rebuild section it shows this if you are using new parts-

Install the output pinion flange.
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 Nm
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+1
Monday, June 12th, 2017 AT 2:23 PM
Tiny
DERBYKID
  • MEMBER
Some how I missed the step on measuring the torque before disassembling the PTU. I will try to torque it to 142 Nm and see how it runs. Thank you for your information. I'll let you know how thing workout.
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Monday, June 12th, 2017 AT 3:24 PM
Tiny
KEN
  • ADMIN
Please let us know what happens, we are interested to see.

Cheers, Ken
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Thursday, June 15th, 2017 AT 11:41 AM
Tiny
DERBYKID
  • MEMBER
I tightened the nut to 142Nm and I no longer have the clunking noise when shifting. It's been a few days now so I'm hoping for the best. By the way, the reason I had this problem was because the jiggle valve on the PTU was clogged which created a leak. I removed the PTU, cleaned it out, replaced all the seals, and added a drain plug. Not sure why Ford would make this a non-serviceable part. Anyway thank you for your information, it was very useful to me.

Derby Kid
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Saturday, June 17th, 2017 AT 4:32 AM
Tiny
KEN
  • ADMIN
Good to hear, please use 2CarPros anytime we are here to help.

Cheers, Ken
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Monday, June 19th, 2017 AT 11:02 AM

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