Quote:
Originally Posted by Jahay
i was always told that thicker oil, saves your internals. If you have low weight oil or just grease... these brushless systems can unload diffs very badly causing very hard wear on the gears. High weight oils prevents the unloading more so, so the diffs last longer... and thicker oil also has less chance of leaking out of the diff.
when i ran without any oil and just grease... i had really bad traction issues as my savage would just unload all the power to the inside wheels...
i am now going to try a different setup considering im going for 9s power...
50k rear and 60k front... see how that behaves..
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No one will argue that thicker oil means better traction. Just about every one has a different opinion on what weight fluid to run in thier diffs. My experience has been that the thicker oil wears out the gears quicker, and even 50K will blow by the o-rings. I started with HPI grease, then 7000 oil, then 50,000, and now I'm useing an inexpensive lithium grease. Having tried both oil and grease, grease is less maintenance for me which is a very good thing. Perhaps other's have had different experiences, I'm just shareing mine.
I could be wrong here, but the friction vs wear thing makes since to me because the higher friction caused by the thicker oil forces more metal on metal pressure between the gears resulting in a shorter lifespan. With grease, the gears are able to spin freely and don't grind eachother down as quickly. Works in my mind anyways.
I've driven both with Oil and Grease, and there is not enough of a traction difference to matter to me. If I did a lot of crawling, steep hill climbing, or racing, perhaps it would. One of these days, I'm going to lock both diffs, just for fun, but only on a temporary basis, because I know that will be torture on the rest of the drivetrain.
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