Typhon Rear diff full of dirt

That much dirt shouldn't have gotten in your gear box and from what I can see, it looks like your pinion gear teeth are shot.

bicketybam said:

That much dirt shouldn't have gotten in your gear box and from what I can see, it looks like your pinion gear teeth are shot.

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What do you exactly mean by "shot"? Is it broken?

Typhon6smax said:

What do you exactly mean by "shot"? Is it broken?

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It looks like the teeth are all chipped. Hard to tell with the dirt. Maybe someone else can chime in.

Imo this is metal dust, coming from the gears. Your gears are completely worn.

jym73 said:

Imo this is metal dust, coming from the gears. You gears are complety worn.

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It is way too much, it can't be metal. It is a hand full. The whole diff case was full of it

Rebuild the diff and when you put it back in the case, use thick grease to seal the case. @Primarrma has YouTube videos on how to do this and keep the case sealed. He runs in fine sand so it was very important for him.

I was thinking ground plastic from the inside of the case, but it's hard to tell what's torn up and what's just more dirt.
And I agree with Bam, that gear shouldn't look like that. How long were you running it making noises like that?

Typhon6smax said:

It is way too much, it can't be metal. It is a hand full. The whole diff case was full of it

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Wow, that's a lot, so yes, it shouldn't be metal. But as said, rebuild the diff. There is also a gearbox gasket available to put underneath the gearbox : https://www.ebay.fr/itm/Arrma-Krato...667918?hash=item3b19d82c0e:g:PF0AAOSwzVhbXQz2

Typhon6smax said:

It is way too much, it can't be metal. It is a hand full. The whole diff case was full of it

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Have a magnet? You could find out....

CofNailz said:

I was thinking ground plastic from the inside of the case, but it's hard to tell what's torn up and what's just more dirt.
And I agree with Bam, that gear shouldn't look like that. How long were you running it making noises like that?

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It didn't even make noise while running, only if I turned it by hand.

jym73 said:

Wow, that's a lot, so yes, it shouldn't be metal. But as said, rebuild the diff. There is also a gearbox gasket available to put underneath the gearbox : https://www.ebay.fr/itm/Arrma-Krato...667918?hash=item3b19d82c0e:g:PF0AAOSwzVhbXQz2

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Sadly, I live in Europe, so ebay is not an option. But I will take a look at some gaskets.

I had this same issue. It's in my post history. I fixed it by putting a small bead of silicone on the bottom of the gear box before installing it. I also put some grease on the gearbox where the bearings seat. This helps as well.

The dirt in the rear diff happened to me twice on my senton before I used the silicone. It wore my gears down so much that they had to be replaced. Horizon sent me the parts under warranty.

I use gorilla/duck tape as a gasket. Just a few strips under the diff case and cut to fit. Works great

Make sure you get some rubber sealed bearings for your vehicle when you rebuild.

make sure you tight the diff case to the chassis... also, as others suggest ducktape/gasket/silicone may help isolate the inside of the diff case...
But from those pics it seems that your gears are destroyed... the input pinion looks so worned out that you can see a sharp side on the right side of each teeth. each teeth should look simetric.
I'd replace both crown gear and input gear for sure...

I don't think all that dust is due to metal wear... But part of it definitely is. I'd say that once the gearbox starts to trap dust/dirt, gears should wear much faster...
Try the magnet as @LibertyMKiii suggested... also check the inside of the gearbox for wear...
Another thing that may help you finding the problem is to remove entire gearbox and check if the part of the chassis were the gearbox sits has dust. Hope I made myself understandable
If your gearbox is well tight to the chassis you'll see that the zone were it sits its pretty clean and you should see the perfect mark of the gearbox base in the chassis...

Hope this helps

Typhon6smax said:

It didn't even make noise while running, only if I turned it by hand.

Sadly, I live in Europe, so ebay is not an option. But I will take a look at some gaskets.

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It's 7.5 Euros shipped, why wouldn't that be an option?

If you can't order the gaskets you can go to an auto parts store and by a roll of gasket material. Then trace the case onto the material and cut it out. Might not look as pretty as store bought, but it will do the job.

Is it really just me?

Why isnt there ANY grease in that whole housing?

Might be the weirdest thing to do.. But to determain whats in there.. Just have a taste.. You will taste the difference between plastic or dirt.. Promise you that!

Omg. How long since the last diff rebuild?

Buy a new complete gearbox from Jenny's and check the front one too. Those old gears are toast. Then seal every join with grease, it will work fine, and try to service your car more often.