Kraton First kraton, first exb
- Thread starter rgard6
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Wohoo!
.I'm sorry to hear that, I have a thread already about my issue. Have you opened your back diff up? I wonder if the back of the sun gear ate it like mine did. On one of many of the Kraton Facebook groups I've had a few people tell me their did the same thing. It's funny all the YouTubers who reviewed the new EXB all had glowing reviews and you can blow the diff out of the box. I'm brand new to the hobby so I have no idea what I'm doing, I just don't want it to happen again.
rgard6
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I picked up my warrantied rear diff today and installed it. All looked good as far as i know.. Were similar in that i know these trucks inside out besides the diffs , ive not had much trouble with diffs in the past year with any of my arrmas except a straight up replacement in a 3s blx.
I ran it on 50% for a bit then 75 then 100 but i didn’t go all out because the guys at my shop were convinced it would happen again. When i was at 100% i wasnt going crazy. I was on mainly flat grass and concrete (like i was the other day when the first rear diff broke) and it was fine. I couldnt bash bash cause i was chasing my kids around too. Will update if something happens
Hammer Down
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That’s crazy! You shouldn’t have to baby an EXB. 
rgard6
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Yeah i know its dumb. I heard nothing but good things about previous kraton exbs so i was thinking this version would be great out of the box but maybe they messed up with the diffs. I’m not the only person who has had diff issues within days of release unfortunately. Time will tellThat’s crazy! You shouldn’t have to baby an EXB.
rgard6
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Update as of 2/28 replacement rear differential holding up fine.
Im shocked at how much fun i actually had driving this truck today it is such a beast. Before this, I only success was a fire team which I have since customized but still running on xlwb. This exb v6 performs so well it’s a lot of fun
Im shocked at how much fun i actually had driving this truck today it is such a beast. Before this, I only success was a fire team which I have since customized but still running on xlwb. This exb v6 performs so well it’s a lot of fun
Good hear your new diff is working. I got my replacement diff as well and set it aside. Since I already had her opened up I went ahead and rebuilt the old diff in the Armma aluminum diff case and ran her today, Everything went great so far. I need to get out to a larger field and really go 100% throttle though.
One thing I noticed when I took the old broken diff out was that the ring gear was not screwed on tightly at all. I expected the screws to be very tight and they were not. I now wonder if the ring wasn't tight enough and allowed the ping to slip behind the sungear and then game over.
rgard6
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Hah funny thing, i been bashing the hell out of it. Its a fun truck really is but they messed up something with these diffs. The front one just went on me today now. Considering not even bothering with horizon and just getting some different diffs off ebay maybe. Any suggestions?
Ugh, that is bad news. Let us know what Horizon says, see if they send you another new one. Did you find out what broke in the back diff?
I'm not sure what ebay alternative there are that are good. I've read that the Vitavon ones are fairly high end but expensive. They are all upgraded with hardened gears, better output cups, and steel diff case but they're expensive.
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That is basically the same diff with the LSD plates installed and 10k diff fluid instead of 80k. It will change how your car handles. Though, in your case it would just be in the front right?
The most cost effective route I've found for my case is to upgrade to the aluminum diff housing. Assuming that you had the same issue I did with the pin slipping out of the back of the sungear. It's not really not too hard to do but you have to watch a few videos on diff upgrades just so you know what to do. You can have your shop do it as well since it sounds like you already have a pretty good relationship with those guy. They fixed your other diff really fast! They're $20 a pop so you can do the whole truck for $60, part ARA311061.
rgard6
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Honest question, i could teach myself how to rebuild the inside of the diff if i had to but, if switching to the aluminum housing, how does that change the diff other thab reinforce its shell on the outside, for my my issue was a little part on the inside got sheared
332_RC
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The rear & center diffs get really hot. Especially the center. I've had composite center diffs literally melt & fail. Aluminum fixes that issue.
rgard6
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Right makes sense. I don’t doubt that at all. But i got my kraton exb about 10 days ago and both the front and rear diffs have now went. Arrma made a huge mistake with these specific open ones.
Like I’ve mentioned i don’t know diddly bout diffs in the grand scheme of it all but I’m thinking I’ll switch f/r to lsd?
Todd (TC)
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I had the same thing happen with my mojo grom. When I got mine i think it was literally the last one on the whole interweb that hadn't been either marked up it was on backorder. I was watching the stock dwindle as I put my card info in. Stoked for you, man. And a little jealous at the same time, but that's ok
. Have fun dude!
