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If the diff's aren't sealed, then what?

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H

hugo

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I want to change the diff fluid in my Tmaxx. The diff's aren't sealed so what do I do to seal them? What I mean is, I don't want them to leak, so what do I have to do to stop them from leaking? A dude at the LHS said to use silicone sealant to seal the diff's. Is this good advice and if so, what kind of silicone sealant should I use?
 
i use rtv. just run a bead around the cup befor you put the ring gear on. worked for me
 
I tried to seal the stock difs on a Maxx one time. The plastic cases flex under a load and it made a big mess. If you want to do it, you will at minimum need to get a set of aluminum cases and seal them as needed. Even then, the difs aren't designed to to hold fluid and you will get an amount of leaking from the input and output shafts.

I do believe there are 1/8th diffs that can be used.

IMO,
By the time you spend the cash to do it right you may as well have purchased a Revo or an 8th scale.
 
Beason, what's rtv? It's probably called something else here.
 
silicone sealant. like you use in a 1:1 engine to seal stuff. IE, around the water pump, thermostat housing..

12-rtv_silicone.jpg
 
RTV is a silicon sealer available just about any place that sells auto supplies. Most chain stores will have it. It comes in a tube and isn't expensive at all.
 
ED hit the button...you need to upgrade some parts before you do that...you'll get a big gooey mess all over your rug....and it won't be the kind you look at and smile either.....

the plastic cups will flexand just leak that crap all over....the aluminum cups will help but you really need to do the case/collar and the harder gears (RRP) before they can really be sealed.....IF you are gonna try it out anyhoo, use some thick grease around the outdrive cups, but under the washer....smear it inthe bushing inside and all around the outdrive shaft.......and the RTV around the edges of the cup too.......put lighter fluid in the rear...that will hrlp in the turns.......
 
For diffs that don't seal you can just use tamiya grease. You can just add more to give you more of a heavier weight feel. To seal the diffs is just not worth it IMO. If you are looking for sealed diffs you are looking at bucks. Either make a mutant maxx or get a different rig.
 
What is the stock set up on the Maxx anyways? I mean do they come greased or oiled filled? Just trying to get a visual of whats going on and whats she wanting to do.

Thanks
Ray
 
well that sucks. i didnt know maxx diffs sucked so bad. my savy was easy, just rtv the cups. oh well i tried
 
I read in one of the mags. to remove the grease and use diff fluid. Apparently it increases speed and cuts down on wear when the grease is replaced.
 
hugo said:
I read in one of the mags. to remove the grease and use diff fluid. Apparently it increases speed and cuts down on wear when the grease is replaced.
Click to expand...
That is partially true. It helps to use silicone diff locking fluid when you are tuning for your track or driving style. Now the TMAXX diffs DO NOT use silicone. If you try you will have a mess on both ends and can cause damage as it will eventually leak out. If you keep running them they can be damaged.
 
on a normal diff. (buggy savage ext) they are sealed and you can put liquid oil in them. and different viscosity or weight oils give you more and more of a posi track effect. but from what I've read from the great minds of rcnt (i dont personaly own a t-maxx and was going by prior diff experience in general) the t-maxx diffs arent built to hold the oil. the cups flex, and the outdrives dont fit snug enough to keep the oil in. so you have to use the grease. you have your info correct about being able to do so and it helping tune the rig. but the particular rig you have (t-maxx) doesn't have that capablilty.
 
to do what you are thinking about doing...you would be needing something like this to convert the diffs to 1/8 scale diffs
http://www.unlimitedengineering.com/cgi-bin/store/13540.html
those are the absolute most bulletproof diffs you can find.....but you can find other brands and set them up w/ a bulkless system for around 220 bucks.....the bulkless set will replace the whole bulkhead and diff case w/ a single unit and be just indestructable.....heavy but indestructable....lol....run the diffs w/ lithium grease....campagnolo bicycle grease works well and sticks a real thin layer......
 
Plaidfish said:
to do what you are thinking about doing...you would be needing something like this to convert the diffs to 1/8 scale diffs
http://www.unlimitedengineering.com/cgi-bin/store/13540.html
those are the absolute most bulletproof diffs you can find.....but you can find other brands and set them up w/ a bulkless system for around 220 bucks.....the bulkless set will replace the whole bulkhead and diff case w/ a single unit and be just indestructable.....heavy but indestructable....lol....run the diffs w/ lithium grease....campagnolo bicycle grease works well and sticks a real thin layer......
Click to expand...

Did that in my cybermaxx build thread, if anyone wants an idea of how they look.
 

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