Differential cover
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Freshman User
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Differential cover
I have a 1999 F250 diesel 4x4 with manual tranny. Differential cover is rusting to the point it is paper thin. Any tips or tricks in replacing this 12 bolt hole cover? The shop manual says use sealant as a gasket. They sell cover gaskets. Anybody know if a preformed cover gasket is OK to use?
Hook it, I'll pull it.
Joined: May 2007
Posts: 15,037
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From: Grand Lake, La.
Give Clay a call and he can get you what you want/need. Here is what you are looking for. Clay is also a sponsor of FTE.
Riffraff Diesel Performance Parts: - Differential Covers
Riffraff Diesel Performance Parts: - Differential Covers
Elder User
Joined: Jul 2008
Posts: 599
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From: Tucker, GA
I have a 1999 F250 diesel 4x4 with manual tranny. Differential cover is rusting to the point it is paper thin. Any tips or tricks in replacing this 12 bolt hole cover? The shop manual says use sealant as a gasket. They sell cover gaskets. Anybody know if a preformed cover gasket is OK to use?
Postmaster
Joined: Jan 2012
Posts: 2,693
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From: West of Chicago
I've used both silicone and the gasket with no difference. My cover is starting to get moist near the bottom I found a used cover on eBay from California ( no rust) for 50.00. I don't really care for the aftermarket look wich is why I went that route. Oh also no matter what you will still have to scrape the goo off from a gasket it silicone
Elder User
Joined: Jul 2008
Posts: 599
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From: Tucker, GA
I've used both silicone and the gasket with no difference. My cover is starting to get moist near the bottom I found a used cover on eBay from California ( no rust) for 50.00. I don't really care for the aftermarket look wich is why I went that route. Oh also no matter what you will still have to scrape the goo off from a gasket it silicone
https://www.ford-trucks.com/forums/8...with-pics.html
Token Redneck
Joined: Jun 2007
Posts: 9,339
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From: Breckenridge, TX
Mine look's about like Bill's did in that ^^^ link. I'm going with the factory aluminum one and black RTV, unless you tow boats and are sticking your read diff under the water while it's hot, there's really no need for a drain plug in the cover or a gasket that doesn't need a little cleaning when it comes off.
Senior User
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From: Danielsville pa.
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Cargo Master
Joined: Jul 2011
Posts: 2,000
Likes: 4
From: Nowthen, MN
I would use The Right Stuff instead of regular RTV/silicone. It works much better and it can be used immediately, no waiting for it to cure like regular RTV/silicone.
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Logistics Pro
Joined: Apr 2010
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From: Panama City, FL
This stuff works great. 100 times better then RTV IMO.
Hotshot
Joined: Mar 2007
Posts: 10,101
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From: Pa
Thats what I used on the last 4 diff covers I did. Sets up nice and firm like the OE sealant and no leaks.
New User
Joined: Mar 2011
Posts: 8
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From: Fort Wayne IN
The Diff cover did this on my 05 F350's 10.5..I was gonna get a 08+ diff cover at the time but instead went with just a plain old black stock cover. The ford dealer gave me this sealant meant for something on 7.3 diesel. and it sealed it up great! However the motorcraft diff fluid is like 20 bucks a quart..worth it though I guess
Cargo Master
Joined: Jul 2011
Posts: 2,000
Likes: 4
From: Nowthen, MN
Not really. Mobil 1 or Amsoil is just as good if not better at half that price. I don't think the Motorcraft stuff has the LS additive in it either, you have to buy that separately. I know Mobil 1 already has it added and I'm pretty sure Amsoil does too.
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