Replacing Rear Axle Seal
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Junior User
Joined: Jan 2004
Posts: 65
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From: Annan, Ontario
Replacing Rear Axle Seal
Hi im replacing the rear axle seal in my 84 ford f150 2wd, inline 6. its leakin out of the rear u joint, i was wonder if i should take off the diff cover and go from there, or try to loosin the rusted nut from the u joint and take it out from there. take it easy on me people please, rear diffs arent my thing 
Posting Guru
Joined: Jul 2003
Posts: 1,280
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From: alaska
remove the drive shaft at that end , remove the large nut holding the driveshaft yoke to the diff. , take a big screwdriver and pry the old seal out,paying attention to the direction that it faces . find a piece of pipe or a big socket the same size as the outer edge as the new seal and use it to gently tap the new seal in . install yoke, after you clean it and grease the outside that the seal rides on , tighten the nut as tight as possible if your using hand tools and reinstall the drive shaft . good luck,bob
Posting Guru
Joined: Jan 2005
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From: the beaches of florida
ahhh ok, now with mine ('78 f150 4x4) the rear axle is a 9" and dosnt have a drain and fill plug. It only has one bolt thats about in the middle. Do i just fill it up as much as i can? I remember last time i did it it was kind of a pain and i didnt have much luck. I was just sitting there holding the bottle squeezing it for a long time. I broke a siphon cause the oil is too thick. Is there a better way?
Postmaster
Joined: Apr 2003
Posts: 3,587
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From: Virginia Beach
I don't think so on a nine inch. You could get a cheapy fluid transfer hand pump and feed the tube into the hole. Just keep pumping till fluid runs out. Let the oil settle (becuase its so thick), then keep filling until you get the recommended amount in there. The only easy way I have found for other axles that have a rear cover is to turn the pinion down and just fill 'er up 
Ofcourse, alxe work is such a pain, to me its worth the extra effort to just remove it and set it on jack stands.
Ofcourse, alxe work is such a pain, to me its worth the extra effort to just remove it and set it on jack stands.
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