What type of gasket maker for rear end differential Dana super 70?

Sprung Monkey

Original poster
Member
Oct 12, 2017
363
Al
What type of gasket maker for rear end differential Dana super 70?

I’m planning to change the diff. fuild on the 05express 3500 van.

I think there isn’t a gasket but do see some grey gasket maker.old coverrear end cover rusted.jpg

new cover will continue to clean an paint.
initial clean.jpg
I believe I purchased the wrong type of gasket maker I saw the grey on the package not sure what or if I was thinking bc the package says blue. This
rear end gasket maker.jpg

maybe this
corrct gasket maker.jpg
1.should I use a rubber gasket?

2.if yes to ?1 should I smear the correct gasket maker on both sides of rubber gasket?

3. if no to ?1. how thick of gasket maker should I apply?

4.should the cover be tightened snug then wait one hour for gasket to form then tighten?



Part 2 same gasket ?s but for the transmission pan.

Thanks for advising
 
Last edited:

Mooseman

Moderator
Dec 4, 2011
26,016
Ottawa, ON

Sprung Monkey

Original poster
Member
Oct 12, 2017
363
Al
Yes


No


For tranny, use rubber and no sealer. Cork is junk.
I’m a bit confussed on this rear end it has 12 bolts. I think it’s a dana super70. here’s the model #s lable.
dana70S lable.jpg
Here’s a painted diff. cover from y tube has same van w/ same model# lable as mine.
70S cover.jpg


When I look at rock auto https://www.rockauto.com/en/catalog...01,drivetrain,differential+cover+gasket,13411

I get more confussed bc I see 10 bolts an 14 bolts.

this is why I'm leaning toward making a gasket. thanks
 

Mooseman

Moderator
Dec 4, 2011
26,016
Ottawa, ON
If you can't find or match up to the proper cover and gasket, then you definitely can use an RTV gasket maker. It's just more of a PITA to clean the next time to take the cover off.

That Permatex one you posted above looks to be a specialized one for diffs and would be suitable however just about any type would work. Just follow the directions.

The first one (Permatex #2) is a sealant, not a gasket maker, used with paper type gaskets.
 

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