Diff Question

[Monkey Wrench]

Hello again!

Another question. I am rebuilding the diff's on my Kyosho USA-1 and this is my first time. I think I'm going to run 10/30/3, but I'm not sure how much to put in there. Any ideas? I attached part of the manual with a view of the diff's, so I hope this helps.

I'm not sure if you fill the case up or just coat the gears.

Thanks for the assist!

 

[seajj2]

right about the gears. you need to allow for some expansion. I learn the hard way and packed one up and it locked up.

 

[vbgagnon]

Like seajj said, but you'll want to go to the cross pins. I did a write up on how to add diff fluid.

Here's the link...

https://www.rcnitrotalk.com/2005/how-to-put-fluid-in-your-diffs/

 

[Monkey Wrench]

Thanks folks! I appreciate the advice!
Enjoy the holiday weekend!

 

[olds97_lss]

After looking at the parts explosion, I don't see any o-ring seals. You may want to just run grease instead of oil as it will have a tendency to leak out quickly.

I'd replace all those busings with bearings. Might cost a bit more, but it would last quite a bit longer.

 

[Bouzouki]

I always fill up to the cross.

 

[olds97_lss]

I you do decide to run oil, without seals, run thicker than normal oil and it will stay in longer.

I fill my diffs up to the top of the shaft that holds the spider gears. Seems to work well.