• SAE J3039_202505

SAE J3039_202505

Definition and Measurement of Power Transfer Unit Speed-Dependent Parasitic Loss

standard by SAE International , 05/23/2025

Publisher: SAE

File Format: PDF

$51.00$103.00


SAE J3039_202505 PDF

This SAE Recommended Practice covers power transfer units (PTUs) used in passenger car and sport utility vehicles to support all wheel drive (AWD) operation. PTUs are typically full-time use geared devices (see 3.1). Some PTUs have additional features such as part-time on-demand capability via electronically actuated disconnect features, and other configurations are possible.

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