sealing diffs

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Sharkey

Sharkey

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i read the tutorial on sealing up the diff, its exactly how i was thinking, except for one thing. im not thinking of running grease in my diff, id like to run silicone oil (thinking 50k wt). sealing the sleeve to the carrier and around the ring gear will do the trick in those locations, my only concern is the outdrives. now grease wont leak between the outdrive and carrier, but oil will likely seep. has anyone tried sealing them up with an o-ring??? anyone had any luck with silicone oil in an fg/duratrax type diff??? if so, how did you seal it up???
 
The pre-build diffs come with fluid already in them. At least in the hpi baja, fg and MCD they do.
They already have O-rings in them and no leaks occur.


Chris
 
if your running a standard FG diff ....one question:clown:

why would you want to use oil and not the grease as they where

made for.......its only when you get diffs as in the viscous type that use

plates you use oil..........

but not all grease is the same either :helpsmilie:there is grease for all different

applications ......but for the FG standard diff then this is the one

not cheap but one of the best :boat: this tube is around £40

grease007.webp

grease004.webp

as for sealing a standard diff there is no where to place an "O" ring and the

alloy conversion it runs on needle roller bearings so no where to machine

a recess for an "O" ring

in the MCD type diffs then there is another way to go as in spray wax

as it is called which is a clear liquid which then after 30mins goes

very sticky and clingy:clown:which is basically its a chain lube

grease001.webp
 
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i was wanting to fill the diff up with silicone oil to make the diff less like an open diff, more like a limited slip, just like you would in a 1/8 or 1/10 scale. however last night after i posted this i came up wit ha better idea. i know of a transmission stop leak additive thats very thick and extremly sticky. with the thickness of this stuff i cant see it leaking out of the outdrives. im going to give it a try and see how it works, the stuff is a lot cheaper than silicone diff fluid, so if it doesn't work, no big deal.
 
ya hurry up and head to the shop. I wanna know if I should hit canadian tire and buy a bottle myself... I think this will work.. we were discussing this online... started thinking a half full dif with dif lock wouldn't seep out and give some nice dif action... it's gooey stuff. then alternatives. I was thinking stp crap is thick when Steve mentioned the tranny stuff.. I have no knowledge of using this stuff but steve works in atranny shop, so you have to trust the guys with first hand experience...
 
If you get the aluminum FG diff upgrade, you can run a thick oil / Silicone, as it has o-rings on the outside. But you have to watch out the Outdrives do not seal. I had a grove machined into the outdrive gears to accept an O-ring. Yet you need to put on silicone lube on the o-rings to help them seal better and then you can try different viscousities. But you will still get a bit of leakage from the out-drives. Your best bet is grease. But just a heads up if you want to give it a try. FG does offer a Viscous diff (but for your first child and your mortgage)
 
pipeous said:
ya hurry up and head to the shop. I wanna know if I should hit canadian tire and buy a bottle myself...QUOTE]

My thoughts exactly. i have used the thickest tackiest grease I could find and its stiffened it but I still would like to stiffen it more. My FG differential that is. :laugh:
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