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Reason behind aluminum diff case..?

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Reason behind aluminum diff case..?

Old Yesterday, 07:30 AM
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Default Reason behind aluminum diff case..?

Other than it looks neat, is there a reason to use an aluminum differential case? I have seen some which have a greater liquid volume, but would not not also increase rotating mass on the drivetrain?

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s.
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Old Yesterday, 08:09 AM
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I think the primary claim is that they improve heat dissipation so that oil viscosity doesn't tend to decrease over the course of a run.
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Old Yesterday, 10:25 AM
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Originally Posted by Steve B in Vega View Post
Other than it looks neat, is there a reason to use an aluminum differential case? I have seen some which have a greater liquid volume, but would not not also increase rotating mass on the drivetrain?

Thanks.

s.
Which car? Some kits have pretty low quality, leaky, plastic diffs that the aluminum diffs help with.
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Old Yesterday, 10:37 AM
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large volume will not increase rotating mass..its larger volume is to keep diff oil cooler than a smaller volume 1..
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Old Yesterday, 01:12 PM
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Originally Posted by the rc guy View Post
large volume will not increase rotating mass..its larger volume is to keep diff oil cooler than a smaller volume 1..
I suspect what he means by increase rotating mass he means by a alloy diff case will weigh more than a plastic diff case
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Old Yesterday, 02:17 PM
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It's likely they can hold tighter tolerances with machined aluminum then molded plastic. Could possibly wind up smoother rotation and quieter running. Also less deflection under load is a possibility
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Old Yesterday, 02:58 PM
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Originally Posted by the rc guy View Post
large volume will not increase rotating mass..its larger volume is to keep diff oil cooler than a smaller volume 1..
More oil is more weight. High volume diffs absolutely increase the rotating mass. The trade off is worth it though.
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Old Yesterday, 03:00 PM
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Thanks guys,

Yes, I was thinking the increased weight would be there, but I'm not sure if the change would be measurable, so I figured I would ask. I have seen these for Tekno and Team Associated platforms. Was curious about them.
Out here we do longer, sustained runs at 80% power, and I was curious as to if there would be a benefit. I might give it a try; they are not too expensive.

Thanks.!

s
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