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Old 05-25-2011, 12:07 AM   #1
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Default Noob Diff Question

Hope I don't get flamed for this but I have read around many places and I still can't get my head around diff action and so on.

What I do understand is that a diff allows the wheels to spin at different rate because through a corner the outside wheel has to cover a bigger circle or longer distance then the inside wheel. And that a looser diff is beneficial in low bite situation and vice versa. Here's where I get confused or rather been trying to understand, is a ball diff basically an LSD? Is the gear diff in say a TT-01 an " open " diff? Thing is I keep crossing between full scale diff and RC diff so I keep getting confused. ABut my understanding of an LSD is that when enough force is applied, let's say 10 on a scale of 1 -10 that it locks up and becomes a spool pretty much and applied force lower then 10 will incur diff action with the power going to the wheel with the least traction. Is this basically a ball diff?

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Old 05-25-2011, 01:36 AM   #2
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A ball diff is a form of LSD but it is a lot simpler than the diffs you have in a full size car.

Basically it uses the pressure of the plates on the balls to resist the diff action.

Oil-filled sealed gear diffs are another simple LSD.

A lightly greased gear diff (like you find in a TT-01) is basically an open diff, it has almost no resistance to the diff action.
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Old 05-30-2011, 04:58 AM   #3
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Thanks dude, that clears it up a lot.
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Old 05-30-2011, 06:42 AM   #4
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Default Limited Slip Action

Think of it like this...

The heavier the silicone oil (diff fluid) you put in the diff, the more it will lock, sort of like changing the spring tension or adding clutch discs in a 1:1 diff for it to lock up more and give more equal traction to both rear tires (or the front as the case may be in an R/C car)...

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