hublock

hublock
In 4-wheel-drive vehicles, it is inefficient to have the front wheels connected when not needed. Most older vehicles required a person to get out and manually switch each front hub. Now these hubs can be changed remotely with a switch inside the vehicle.
Also see

Dictionary of automotive terms. 2015.

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Look at other dictionaries:

  • vacuum hublock — See pulse vacuum hublock …   Dictionary of automotive terms

  • pulse vacuum hublock — This is a new scheme of switching the hubs in a four wheel drive vehicle using a pulse of vacuum rather than electrical solenoids, which are heavier and more prone to failure …   Dictionary of automotive terms

  • vacuum — An enclosed area in which the air pressure is below that of the surrounding atmospheric pressure. See air valve carburetor constant vacuum manifold vacuum ported vacuum advance pulse vacuum hublock venturi vacuum …   Dictionary of automotive terms

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