R/C Tech Forums - View Single Post - 1/8 scale truggy center diff destroyed - how to prevent?
Old 03-12-2019, 06:05 AM
  #11  
Sir 51D3WAYS
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Join Date: Jun 2011
Location: Stuck in urban hell
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Originally Posted by smirkracing
- bearings seem ok - spinning freely

- temps are a smidge higher than I like. I have a heat gun and use it often, currently temps are 170ish with the smallest pinion I can fit (15t)

- tires are large and heavy and do have high traction:
https://www.horizonhobby.com/DYNW0041?KPID=DYNW0041&CAWELAID=320011980001424900 &CAGPSPN=pla&CAAGID=37462622311&CATCI=aud-112431678027la-531206008942&gclid=EAIaIQobChMI4N-w2qb44AIVoxx9Ch1jfQb8EAQYASABEgIso_D_BwE

- surface is grass, which is surprisingly high-traction. It would be safe to say there were plenty of landings that brought all four tires down on the grass pretty hard, resulting in stress on the entire drivetrain

- I think the diff case was ok - it was only a month or two old.

With all that said, I don’t have the space or the skills to really put the ET48 through the sort of stuff you see on YouTube, so it doesn’t seem like I am anywhere near any real edges of durability.

Oh, in case it helps, this is all for a general bashing use case. I don’t have any tracks near me.

Yup a combination of high traction tires and a metric assload of power, with a few 4 wheel landings will result in a borked diff.
It's impossible to tell whether the case was good or bad by look or feel, as there may be something wrong internally or on a microscopic/chemical level.

I suggest one or more of the following.
1. Try and land on 2 wheels as much as possible.
2. Reduce power, you don't really need that much.
3. Get a Slipperential.
4. You could maybe up the diff fluid as suggested above.
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