Very minor diff cover leak: And I meen slight! Do you folks change the gasket out with a new one or just use RTV on the cover?

Any preference on diff lube on F150's?

2003 F150 2x.

Thanks

 

Use RTV on the cover. I use Lucas 75-140 in the rear. It's about half the price of what you will get at the stealership. 3 quarts.

 

i used RTV on my cover and i use amsoil 75-140 diff fluid.

 

X 10,000!!!!

 

I did use RTV, but it leaked on me so I went with a gasket. Rock auto has them online for under $5 and it works very well.

 

The trick with the rtv is to put a uniform bead around the cover and let it set-up almost completely(like six hours), then bolt it on. It will be removable/reusable the next time!

 

And go completely around the bolt holes, not just along the outside border of the cover.

 

Get a tube of this and it will never leak agian. My diff cover was a nightmare to get sealed because of gouges in the housing. Greatest stuff known to man. God's gift to the automotive world.

http://www.permatex.com/products/aut...sket_Maker.htm

 

Thats the stuff I used and it is good stuff..

 

It's more than good stuff. When my diff started leaking at the cover it was a 3 day schimozzle of swearing and throwing tools. I tried every kind of rtv I could get my hands on. Even dipped into dads super duper aviation stuff and nothing would seal it. talked to my parts guy and he said that he has something. It was the right stuff and it worked like a charm. Even the second time I have had it off.

 

75/140 mobil 1 synthetic and O.E. gasket with High tack on the diff side.

 

are you sure its leaking out of the back cover? did you check the seal in the front..mine seaps out of the front seal and blows back while im driving making it look like its leaking from the rear cover