Making a new diff gasket

[bluebombersfan]

In my haynes manual it say's I can use silicone sealant or RTV sealant on the diff cover? Is one better then the other, I went with the rtv sealant for $10 but there was also ultra rtv sealant for $15.
Any other tips for getting a proper seal

 

[BlackBII]

Regular RTV will work fine.

You can usually gets gaskets for around 10$ tho..

 

[Frank The Tank]

The front diff on my truck came from the factory with silicone!!!

it started leaking, I took cork/gasket sheet and hammered around the cover, replaced....... not a leak since.

Frank

 

[Jspafford]

RTV is fine if applied to a clean, dry, surface.

 

[bluebombersfan]

Okay I think thats the most important tip applying it to a clean dry surface especially considering how oily and messy the cover would be

 

[locovaca]

When I did my rear diff I used a Felpro gasket and some gasket sealent. Probably overkill but haven't had a drop leak out.

 

[dangerranger83]

My rear diff. cover has blue RTV on it and it hasnt leaked yet. Clean the surfaces with a degreaser. I use laquor thinner.

 

[Sasquatch_Ryda]

Yup, just make sure its oil free. Silicone won't stick to oil or old silicone for that matter.

 

[johndeeregarner]

If you get any get the harding stuff. The other stuff don't work very good. I've had bad luck with it.

 

[BRUTUS_T_HOG]

they key is to apply an even bead all the way around the cover, then set it loosely on the diff with a few bolts and let it dry as a bead. then tighten

 

[flyingstoners]

the right stuff its made by permatex. its a little pricey but the best on the market. alot of oem's use it instead of gaskets

 

[Sasquatch_Ryda]

I'm pretty sure our Motorcraft Ultra Grey RTV sealant is made by permatex. Never had any problems with it. Lay a 1/4" bead all the way around the cover and tighten it down. Fill with oil and you're good to go. Never ever had a problem doing it that way, nor has anyone else I work with. Once it drys, you pretty much don't need the bolts, it takes quite a bit to get the cover back off.