PTU rebuild?

Tiny
EDGARBEERBOWER
  • MEMBER
  • 2009 FORD EDGE
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 80,000 MILES
A year later grinding in the front. First thought wheel bearing. Change both. Of course, not the problem. Do research and find out about the PTU problems. And that you can’t service or rebuild them. But seen rebuilds online. Sorry so long trying to cover everything. I took it out and open it and definitely looked like the oil had never been changed. I checked out the gears, they still look really good. And idk how. With how thick the muck inside was. Cleaned it up and noticed that the bearing under the (ring gear) is bad. I take it apart I am able to remove the bearings, have them matched and pressed them on. Go to put it together and the first could pinon treads got a little beat up. I have tried to find what size die and nut is needed as ford say to always change them when taken off. Please and thank you! Sorry again for the long post.
Thursday, April 3rd, 2025 AT 6:05 PM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 50,596 POSTS
Its not a problem but I am not sure, is the problem the "pinon threads", if so, you will need a tap and thread file to straighten them out, can you upload an image so I can see? I have had problem with the PTU on other cars as well, the fluid is the issue, they should make it so it can be serviceable. Another Ford moment.

Fluid Types

Transfer Case - Power Transfer Unit (PTU)

Ford Part Name

Motorcraft SAE 75W-140 Synthetic Rear Axle Lubricant

You can change the fluid if you have a vacuum pump inserted through the fill hole for future reference.
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Friday, April 4th, 2025 AT 11:28 AM
Tiny
EDGARBEERBOWER
  • MEMBER
  • 2 POSTS
Sorry if I wasn’t clear I wrote a lot. You’re correct it’s not the nut that caused the issue. It was the fluid. The person that owned it before me never changed it. I rebuilt the PTU but threads need a die ran down it. I’m trying to find the size of die I need and the size nut as well. Since Ford makes them unserviceable, I have to hunt the parts.
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Friday, April 4th, 2025 AT 12:08 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 50,596 POSTS
Yep, I understand, though I don't know the thread size/pitch, but most good hardware stores will have a thread checker that you can get the size from. It might be difficult to find a die that size. They might need to order it.
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Saturday, April 5th, 2025 AT 3:18 PM

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