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SAE J3039 (MAY2025)

Definition and Measurement of Power Transfer Unit Speed-Dependent Parasitic Loss
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SAE J3039 (MAY2025)

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

PUBLISH DATE 2025
SAE J3039 (MAY2025)
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.
SDO SAE: SAE International
Document Number J3039
Publication Date May 23, 2025
Language en - English
Page Count
Revision Level 202505
Supercedes
Committee
Publish Date Document Id Type View
May 23, 2025 J3039_202505 Revision
Dec. 30, 2020 J3039 (DEC2020) Revision