Rear Differential Fluid Change
Post Fiend
Joined: Aug 2002
Posts: 5,324
Likes: 1
From: Denton,TX
I changed mine last weekend and called Ford. There is no gasket available from Ford. I sealed mine with RTV and no leaks. I think it makes for a better seal if you clean everything well and follow the directions.
Freshman User
Joined: Dec 2003
Posts: 30
Likes: 0
From: Buffalo, NY
Diff Cover
Try www.ultraduty.com They make a nice looking aluminum cover. It is also reviewed on www.off-road.com in the ford trucks section, superduty build-up.
Mountain Pass
Joined: May 2004
Posts: 226
Likes: 6
Quick question, While changing the fluid in the rear differential I noticed that the housing was really hot. I had driven it about 35 miles pulling a small boat. Has anyone ever noticed how hot this thing gets?
Elder User
Joined: Jan 2004
Posts: 569
Likes: 1
From: Philadelphia
Speaking of boats, the owners manual says to change the diff fluid every time you submerge the rear....that would be about once a week cause it's pretty much sumerged every time I put the boat in....what a bunch of knuckle heads... 
Mountain Pass
Joined: May 2004
Posts: 226
Likes: 6
Originally Posted by twoballsleft
Speaking of boats, the owners manual says to change the diff fluid every time you submerge the rear....that would be about once a week cause it's pretty much sumerged every time I put the boat in....what a bunch of knuckle heads...
Mountain Pass
Joined: May 2004
Posts: 226
Likes: 6
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Posting Guru
Joined: Oct 2002
Posts: 1,253
Likes: 0
From: Del Rio, Texas USA
guys, ive down this process many times cause i run a Auburn Rear unit, and it calls for oil changes every 7k, i change it at 10k, anyway when i first ordered new gears and the Auburn, the gears came with gasket, i leaked, ever since then ive changed it maybe 6 times, my trucks got 50k now... and the last 5 times i used gasket maker, same as ford does, and it has never leaked.... ive had luck with the gasket maker, if it leaks you probably applied it incorrect, or did not allow it to dry for a couple hours before you added oil....
JJ
JJ
Junior User
Joined: Sep 2011
Posts: 81
Likes: 0
Ford F250 Differential
I changed the differential oil on my new old 2004 F250 that has quite few miles on it and since I like to use gaskets, the local O'Reillys stocks them,, it is made by Fel-Pro and cost 5.99,,,the only tough part is paying 15.00 per quart of synthetic oil.
Posting Guru
Joined: Sep 2011
Posts: 1,076
Likes: 0
From: Mt. Holly Springs, PA
dont be afraid, pick up some Permatex Right Stuff... http://www.permatex.com/brand_right_stuff.htm I have used this stuff for years in the military, and all the normal difficult (tempermental) sealing situations went away. I now swear by this stuff and use it exclusively, where RTV is called for. Permitex also claims you can put the vech back in service immediately, and I can vouch for this, I have done it many times over the years, with military trucks.