Servicing the rear diff.
Thread Starter
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Tuned
Joined: Sep 2005
Posts: 493
Likes: 1
From: Portage, MI
Servicing the rear diff.
I am changing out the oil in my rear diff. I see there is no drain plug, so I guess I just pull the cover off and have a large oil pan to catch the oil. I do have the limited slip additive to put in. Once the cover is off, will any ware be easily noticeable? I have a new gasket to put on the cover. When I go to fill, I just fill it until it starts to come out of the fill hole? I am assuming the only plug that is on the rearend is the fill plug, it is about half way up on the rearend.
Thanks in advance for any advice!
Thanks in advance for any advice!
Cargo Master
Joined: Mar 2005
Posts: 2,790
Likes: 24
From: Mount Royal, NJ
You pretty much nailed it on the head.
Guzzle's site has complete picture tutorials:
Welcome to guzzle's Rear Differential Maintenance Web Page
Welcome to guzzle's Front Differential Maintenance Web Page
The Dana 50 and 60 have the exact same procedure for changing oil.
Guzzle's site has complete picture tutorials:
Welcome to guzzle's Rear Differential Maintenance Web Page
Welcome to guzzle's Front Differential Maintenance Web Page
The Dana 50 and 60 have the exact same procedure for changing oil.
Lead Driver
Joined: Dec 2006
Posts: 7,092
Likes: 145
From: San Diego, CA
If it already has additive, don't add anymore (yet). If you hear/feel chatter in the rear when you turn you should add more. I would recommend 1oz at a time. Then drive around some more to see if the problem is solved or persists. I used Mobil 1 syn 75/140 in mine (which comes with the friction modifier in it) and have not had to add any at all. I did buy a 4oz bottle from Ford just in case but haven't had to open it yet. If I get any rear end chatter then I'll add.
I've never heard of a gasket for the differential cover. I used RTV with my synthetic and have had no problems with it at all.
Thread Starter
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Tuned
Joined: Sep 2005
Posts: 493
Likes: 1
From: Portage, MI
Hmmm, Im beginning to wonder if I should use the gasket or use RTV. Im thinking maybe taking the gasket back and getting RTV. Anyone else have any thoughts on this??
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Cargo Master
Joined: Dec 2007
Posts: 2,822
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From: Minnesota
I did mine about three weeks ago and everyone said to use RTV. I am surprised you could even FIND a gasket for it, both Ford dealers by me said there is not one made for the rear diff on the X. I'd go RTV, I used it and also used synthetic (Amsoil) and also have had no issues!
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Postmaster
Joined: Jul 2006
Posts: 2,632
Likes: 4
At what point should the rear fluid be changed? My mechanic is ready to do it whenever I am ready.
But I only have 52,000 miles on my biggest baddest SUV on the road!
Wait a minute, it can't be the biggest and baddest; it ain't go no diesel. Second biggest baddest SUV on the road!
But I only have 52,000 miles on my biggest baddest SUV on the road!
Wait a minute, it can't be the biggest and baddest; it ain't go no diesel. Second biggest baddest SUV on the road!
Thread Starter
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Tuned
Joined: Sep 2005
Posts: 493
Likes: 1
From: Portage, MI
I just used RTV. I didnt add any additive yet, im letting the truck sit for the night and will test drive it tomorrow and see if I need to add any additive.
Thanks for the help everyone.
Also, everything looked good inside the case.
Thanks for the help everyone.
Also, everything looked good inside the case.
Elder User
Joined: Sep 2008
Posts: 625
Likes: 0
From: Stafford, VA
You could but... I'm pretty sure the fill is where it is for a reason. You only want so much fluid in there as you need room for expansion and you don't need the entire diff. assy. sitting submerged in oil.