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Rear Pinion Seal

Hey guys, my rear pinion seal is leaking and I need to replace it. Kragen/Autozone/Napa have like 5 listed for the truck. I have a 9inch rear end and I dont know what size goes with it. Is this something I am going to have to take off and take in? Or is there a certain diameter that came stock on the 9inch rear ends?
 

blacksnapon

Moderator
Staff member
9,461
301
waynesville,mo.
Hey guys, my rear pinion seal is leaking and I need to replace it. Kragen/Autozone/Napa have like 5 listed for the truck. I have a 9inch rear end and I dont know what size goes with it. Is this something I am going to have to take off and take in? Or is there a certain diameter that came stock on the 9inch rear ends?
It would help if you had the tag off the diff. Its usually attached by one of the diff bolts.
 

1985 Ford F-150

Country Boys Can Survive
7,816
307
Tooele, Utah
You could also take it off and match it up. Ive found that thats the best way to do it so ya dont have to make 10 trips cause they keep givin ya the wrong one.
 

Mil1ion

Still Da Man
4 Possible axles

WDM Non- Locking
WDM - Locking

WFE - NON-Locking
WFE- Lodking


can you check the spline count - 28 or 31 ?

what is the axle on the door tag ?
 

Mil1ion

Still Da Man
All he has to do is provide an answer to my questions.
 
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Mil1ion

Still Da Man
WFE
WDM

driving pinion oil seal D4AZ-4676-A
 

Mil1ion

Still Da Man
13 should be 2.75
x is adjustable steering column.

Check the end of the axles. if the splines run straight to the end from the machined area then they are 31.
If there is a taper first then they are 28

The Ford number I provided above works on both application
 
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Mil1ion

Still Da Man
R/b - E0tz-4676-b

They should be ABLE TO CROSS REFERENCE FROM THe FORD #
 
Last edited:

Mil1ion

Still Da Man
1979LubricationProducts2.jpg




Hypoid gear oil Weight = 90

Buy 4 qts
 

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