Differential fluid
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Posting Guru
Joined: Jul 2010
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From: Fort Worth
How much of the sealant will I need? I found the Permatex "The Right Stuff" in a 3oz and a 4oz.
ALSO - What about the Permatex Hi-Temp Red RTV gasket? It withstands up to 650F, higher than the other stuff.
ALSO - What about the Permatex Hi-Temp Red RTV gasket? It withstands up to 650F, higher than the other stuff.
Hotshot
Joined: Aug 2006
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From: Whittier, CA
I hate to disagree with DKF, but IMO that is the wrong stuff. Even though it probably works.
I used this stuff:
http://www.permatex.com/products/Aut...sket_Maker.htm
But now they have a new one specifically for differentials, and this is what I would use if doing the job today:
http://www.permatex.com/products/Aut...tv_sealant.htm
Whoever said they have way too many options was correct!
Oh, also, a 3.3oz tube will be plenty for both diffs.
I used this stuff:
http://www.permatex.com/products/Aut...sket_Maker.htm
But now they have a new one specifically for differentials, and this is what I would use if doing the job today:
http://www.permatex.com/products/Aut...tv_sealant.htm
Whoever said they have way too many options was correct!
Oh, also, a 3.3oz tube will be plenty for both diffs.
9 ECHO 1
Joined: Aug 2009
Posts: 12,467
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From: Missouri
I bought a tube about the size of an iphone (but a skinnier) and ended up using half of it and threw the rest out (i accidentally punctured the tube so it had to go).
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From: Fort Worth
Okay, I have my Valvoline SYN Power gear oil 75W-90 for the front, 75W-140 LS for the rear, and Permatex Gear Oil RTV Sealant ordered at O'Reilly and going to pick up in the morning along with the other various items I need for the job.
What cleaning solvent is recommended? I have some Brakleen now. Will that work? Also, do I need to sand off the surface rust on the differential cover before I spray Rustoleum on it?
What cleaning solvent is recommended? I have some Brakleen now. Will that work? Also, do I need to sand off the surface rust on the differential cover before I spray Rustoleum on it?
9 ECHO 1
Joined: Aug 2009
Posts: 12,467
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From: Missouri
I used lacquer thinner to remove the excess silicone sealant then took 120 grit then 220 grit to the surface where the new sealant was applied. Also, a putty knife will get the big chunks off nicely. Make sure you have some Simple Green or similar to clean the inside of the cover (if you wish). When you are working on the gasket surface of the axle, make sure to cover the exposed gears. I used a plastic bag.
9 ECHO 1
Joined: Aug 2009
Posts: 12,467
Likes: 58
From: Missouri
Oh, no you do not NEED to sand it. Rustoleum (or similar products) are designed to go right over rust. However, I put a wire wheel on my grinder and took it down a few layers. It will look better that way.
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From: Fort Worth
Yeah, it would probably look better if sanded, but if it will apply nicely over the rust, I'll just spray and go. I don't have much on there, I just figure I will do what I can to prevent any future issues.
My oil pan has a bit of rust on it, what about just spraying that as well?
My oil pan has a bit of rust on it, what about just spraying that as well?
9 ECHO 1
Joined: Aug 2009
Posts: 12,467
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From: Missouri
Yeah, it would probably look better if sanded, but if it will apply nicely over the rust, I'll just spray and go. I don't have much on there, I just figure I will do what I can to prevent any future issues.
My oil pan has a bit of rust on it, what about just spraying that as well?
My oil pan has a bit of rust on it, what about just spraying that as well?
Post Fiend
Joined: Mar 2007
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From: Texas
For the 7.3, the best way to remove the pan is to pull the motor. Treating rust can be done with the engine in the truck, and depending on how picky you are, you may not even need to tape it off. Just be sure it's clean first.
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From: Fort Worth
Yeah, I know about the pull the engine thing for the oil pan. That's why I want to stop rust so that I don't have to replace the oil pan due to rust may years down the road.
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From: Fort Worth
I bought it here and I believe it was a local vehicle. There is no rust anywhere else. There is a bit of surface rust on it. I just want to treat it now before it, if ever, becomes a problem.
Hotshot
Joined: Mar 2007
Posts: 10,101
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From: Pa
My old oil was a nice maple syrup color, and my limited slip still works.That's probably not a coincidence.
I hate to disagree with DKF, but IMO that is the wrong stuff. Even though it probably works.
How much of the sealant will I need? I found the Permatex "The Right Stuff" in a 3oz and a 4oz.
Where did you get your truck? Oil pan rust is rare around Ft. Worth. I'd sand or wire wheel that down before painting the oil pan and keep a close eye on it.
