Gm Global Technolgoy Operations, Inc.

Chad M Huls

Anil Kumar Sachdev

Zhe Li

Wenying Yang

Robert Benson Parrish

Abir R Das

A hydraulic gerotor pump for an automatic transmission may comprise a housing and a gear set rotatably disposed within the housing. The gear set may comprise an inner gear and an outer gear having radially opposed intermeshing teeth that together define a plurality of circumferentially disposed variable volume pumping chambers therebetween. The housing may be made of a first aluminum-based material, and the inner gear and the outer gear of the gear set may be made of a second aluminum-based material. The linear coefficient of thermal expansion of the first aluminum-based material may be substantially the same as that of the second aluminum-based material.

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Royal Oak, MI, United States of America

Chad M Huls