chilly81
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- #21
That's interesting - I had always thought lithium was OK on plastic and it was petroleum that messed with it. Not may area of expertise though - could be wrong. I haven't noticed any degradation and I've been using it for quite a while. I was only referring to those hyped specialty greases that come in tiny tubes and cost a bunch. My gut feeling is they make no real difference vs plain grease in RC car applications.. but I haven't done any scientific testing to verify that. But if it's eating plastic that would be bad indeed!Superlube synthetic grease is very good and unlike lithium grease (including red and tacky, which is red lithium grease) it is safe on plastics. Use bare minimum though, just smear it onto the ring gear and you’re set.
Make sure the bearing on the diff yoke is pressed in all the way. The diff yokes are usually too tight when new, but do wear in.
I personally don't like that because the teeth end up being very pointy after and the worn out material is now mixed with your grease.
So what I do is remove the bearing and sand/file the back face of the yoke (where the bearing sits up against) down. Install the bearing and test again.
I just keep repeating that until it feels like it's spinning smoothly.
Now the case doesn't have to be left loose and you get a perfect mesh.
That's a good thought. I did think of those interactions you are addressing and made very sure everything was scraped out and super clean and seated fully (like 4 times!). But hadn't thought of sanding it out a bit.