The Jake Brake Isn't Actually a Brake (And That's the Point)
The Jake brake on a semi truck isn't actually a brake — it's an engine compression release, and that distinction is the entire reason it works. Most people get this wrong.
In this video, we break down how a Jacobs engine brake actually works on a diesel engine, why truckers rely on it to save their service brakes on grades, and why some towns have banned the jake brake sound entirely.
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Truckers — what's the steepest grade you've used the jake on? Drop it in the comments.
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