This SAE Recommended Practice defines the principal terms and equations pertaining to automotive automatic transmission clutch plate, band, or other wet-friction systems. The terms apply directly to friction-system testing as is typically conducted on inertia-stop test equipment. Some terms can be directly applied to the analysis of friction in the transmission or brake assembly and other friction-test equipment.

The glossary is intended to provide a collection of definitions in the hope of eliminating confusion in development and their application to passenger cars and trucks.

This document focuses on the terminology of friction-system testing. References for this type of testing are shown in Section 2.

Rationale

5 year review.

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