SAE J3039_202012 PDF
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Definition and Measurement of Power Transfer Unit Speed-Dependent Parasitic Loss
Description
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.
History
| J3039_202505 | 2025-05-23 | Latest | Reaffirmed |
| J3039_202012 | 2020-12-30 | Historical | Issued |
| ISSUING COMMITTEE | Drivetrain Standards Committee |
|---|---|
| DATE | 2020-12-30 |
| DOI | |
| ISCURRENT | |
| PAGE | 12 |
| PUBLISHER | SAE International |
| REVISED | ISSUED |
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