Teton differentials keep stripping

[buffgold]

I’ve got a Latrax Teton, upgraded to brushless and worked great for quite awhile after the upgrade, but eventually stripped out one of the 2 stock differentials, which are plastic. I replaced both with OEM 7579X the metal replacement, which as far as I can tell is the only replacement part available. I used white lithium grease to lubricate, cleaned and lubricated the bearings, and replaced the spur gear at the same time (54T). I reused the same plastic collars for the driveshafts, also the only option I could see (driveshafts are upgraded to aluminum, too, as is suspension, though I don’t think that matters for this).

I drove it for only around 20-30 minutes and both differentials stripped out again! Drove pretty hard on mixed terrain, concrete, dirt and grass, but not really different than I usually drive it.

On disassembly, the teeth on the long output shaft were worn on both differentials.

Trying to figure out if I did something wrong during the replacement and fell into a known pitfall, or if it is something with my setup (like one of the wheels is too tight or something), or if this is just a fact of life with the brushless motor. I’m essentially winging all my work on the thing, not really reading instructions or watching videos, just trying to make sure I don’t have too many parts left over when I put it back together Lol

It seems like maybe there was too much play in the housing so the gears could slip. Did I miss a spacer or a bushing? I just put the stock bearing back on the differential before seating it in the house. Do I need to upgrade the diff housing (actually I just ordered new diff housing because why not).

Looks like not a ton of action on the forums for this model, but thought it would be worth an ask anyway. Appreciate input!

 

[tntpoof]

wrong grease did you shim the new gears ? I'm thinking no. a much more thicker grease is needed.i use a combination of 500cst and 10000cst 50/50

https://www.amainhobbies.com/traxxas-diff-oil-grease-maintenance-cars-trucks/c1653?fb=23&msclkid=9651da96aa661db32902bf8bb9b62d6d&utm_source=bing&utm_medium=cpc&utm_campaign=AH - Search - Dynamic Content - RC Category - US&utm_term=amainhobbies&utm_content=Dynamic Search Ads - AMainHobbies

https://www.bing.com/videos/rivervi...&mid=FE010EEADC781104C67CFE010EEADC781104C67C

 

[buffgold]

Hey thanks for your reply.

I saw the pinned thread on diff oils, and that definitely had me thinking. I’ll look through the videos you linked tonight, though I had searched for this specific diff before posting and didn’t find much. Definitely curious about shimming, will look at that.

I‘m 90% sure this specific differential was not designed to be encased in oil… the case is basically a base and a cover with no seals between…it would leak out everywhere, and there has never been any signs of that. When I opened it for the initial replacement, it was totally dry in there.

The instructions did mention a specific Traxxas grease that I didn’t have, so I used white lithium instead… wondering if that was my mistake.

Will keep looking, but if anyone has worked on this specific differential and had input I’d appreciate it.