[Chafalls7.3Powerstroke]

I have a rear end leak. 1999.5 F350 Dually. I know its the front seal it is coming out the front of the pig. What is the name of that seal and where is the cheapest place to get it any ideas?

Thanks for your time, Matt

 

[Oneof6]

Pinion seal, I don't know the cheapest place to get it. Are you certain it is not just overfilled? That will make them leak, or, is it a gusher or an occasional drop? For the occasional drop I wouldn't do a thing except check the level often and park on something I didn't care about getting some oil on. Changing the pinion seal is no big deal, getting the right torque back on the pinion shaft is something that many at the Dumb *** Dealerships say they can do but really don't know how to do without damaging the pinion bearings when they go back with it. That "I can tell by the sound of the impact wrench" style is what I am talking, writing, about. 106

 

[Chafalls7.3Powerstroke]

I will check to make sure it is not over filled. It varies sometimes it dont drip any. I can just see it on the rear end. Then sometimes its a small puddle on the ground maybe the size of a half of a dollar bill.

 

[9696]

Hey Matt,

Where in Michigan are you located, if you don't mind my asking? I'm just south of Jackson and have almost exactly the same truck as you (see signature), minus the mods, with the same problem with the leaky differential. I noticed oil on the pig soon after I bought it and now I have a puddle on my garage floor. I checked the level and ended up putting a quart in it. :shocked: :worried: I don't drive mine much and if it will hold out, would like to get this fixed come fall or by the time snow flies, anyway.

On a side note, you may want to check your vent to make sure its not plugged, building pressure and blowing out your seals.

Mike

 

[Chafalls7.3Powerstroke]

Yes we do have the same truck.. I live in Lake Orion, MI near Pontaic. Yes I have the same leak. I'm gonna check I disnt really think about that honestly. And my fluid was kinda foamy.
Thanks. I do think we have the same leak.