line lock ?

can a line lock also be used as a parking brake or does the car have to be running for it to werk

Not recommended because you need power on the line lock and this will drain the battery.

I think JCwhitney has a mechanical hydraulic brake lock

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Not recommended because you need power on the line lock and this will drain the battery.

I think JCwhitney has a mechanical hydraulic brake lock

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Yup. They're also not designed to be used for prolonged periods of time or they're susceptible to burning up.