[Expedition_mike]

Does this look like a rear pinion seal leak? If so, how hard is it to replace on my own? Thanks in advance. This is on a 2018 Ford expedition max 3.5 EB 103,000 miles

 

[Boatwaco]

Maybe a picture or two?

 

[Expedition_mike]

 

[Floridawombat]

Does this look like a rear pinion seal leak? If so, how hard is it to replace on my own? Thanks in advance. This is on a 2018 Ford expedition max 3.5 EB 103,000 miles

Replacing the seal isnt hard, its tightening the pinion nut back down is what is hard. It takes alot of force to tightn it down. And when you do the seal buy a factory seal if not youll be doing the job again

 

[Floridawombat]

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Yes it looks to be a pinion seal that is leaking

 

[Expedition_mike]

Replacing the seal isnt hard, its tightening the pinion nut back down is what is hard. It takes alot of force to tightn it down. And when you do the seal buy a factory seal if not youll be doing the job again

I may just have the local autoshop do this one. I’m supposed to haul a camper with this suv in 2 weeks. Y’all think a shop would charge me a lot to do the work?

 

[Expedition_mike]

Y’all think I can just top off the rear diff with fluid and go camping still or is this something I should take care of?

 

[Floridawombat]

Y’all think I can just top off the rear diff with fluid and go camping still or is this something I should take care of?

You can top it off and use the truck, just gotta keep an eye on it. And as for what a shop will charge i have no clue a shop would get it done alot quicker

 

[Expedition_mike]

I’ll let y’all know what they charge me when I call Monday. I’ve been having hard shifts from 3 to 5th gear. I wonder if low diff fluid is the cause for this?

 

[Floridawombat]

I’ll let y’all know what they charge me when I call Monday. I’ve been having hard shifts from 3 to 5th gear. I wonder if low diff fluid is the cause for this?

Leaking diff fluid should not be the cause of hard shifts at all

 

[snakebitten]

Yea, the differential is a steady gear ratio. It's unaware that the transmission shifted. And vice versa.

 

[Expedition_mike]

Thank y’all for the help. I will keep you posted on what happens with this thing.

 

[Boatwaco]

Well, you know how it goes around here. You ask for a ‘pinion, you’re gonna get lots of ‘pinions!
🤠

 

[DNA Dan]

Isn't that seal flange supposed to be seated all the way on the diff housing?

 

[Floridawombat]

Isn't that seal flange supposed to be seated all the way on the diff housing?

The seal flange looks to be seated all the way, if your talking about the white flange that is a seal cover/ protector

 

[DNA Dan]

Cover might also be there to keep the shaft from slinging the oil. Seal is definitely shot. time for a diff service.