driving pinion

driving pinion

[′drīv·iŋ ‚pin·yən]
(mechanical engineering)
The input gear in the differential of an automobile.
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References in periodicals archive ?
Ongoing maintenance and thorough re-lubrication at the main component interface, the large diameter bearing and the driving pinion of the gear mechanism are indispensable.
Upstream from the driving pinion is an additional lubrication pinion, i.