For engineers designing and testing automatic transmissions, precise communication is critical. SAE J1646-2012, Glossary of Terms — Lubricated Friction Systems, provides a standardized vocabulary that eliminates ambiguity in specifications, test methods, and technical discussions. This recommended practice, stabilized by the…

The SAE J1647-2015 standard establishes test methods and requirements for evaluating plastic optical materials and coatings intended for use in high-intensity discharge (HID) forward lighting devices in motor vehicles. These materials are typically used for lenses and reflectors. The standard…

The SAE J164-2020 standard (formerly SAE J164 and including content from SAE J151) establishes dimensions and application guidelines for bayonet-type metallic radiator pressure caps and filler necks. It applies to passenger cars, trucks, marine, industrial, and similar applications. The primary…

In fluid power systems, the integrity of threaded metallic tube connections and stud ends is critical. SAE J1644 (cancelled in August 2007 and replaced by ISO 19879) provides a comprehensive set of test methods that remain widely referenced for the…

SAE J1637 is an industry-standard test method for evaluating the vibration damping performance of materials bonded to a steel bar. It is widely used in automotive, aerospace, and marine industries to rank order damping treatments for noise and vibration control.…

Stabilized Notice: SAE J1638-2015 has been declared stabilized by the SAE Non-Hydraulic Hose Committee. The underlying technology is mature and the document is no longer subjected to periodic reviews. Users are responsible for verifying referenced documents and continued suitability of…

SAE J1639-2017 provides a standardized classification and specification system for a limited set of polyamide (nylon) materials used in the automotive industry. Based on ASTM D4066, this recommended practice adds automotive-specific descriptive characteristics and property requirements. It is designed to…

SAE J1633-2019 defines a standardized method for evaluating the speed capability of light truck tires under controlled laboratory conditions. This recommended practice is essential for manufacturers, testing labs, and quality assurance teams who need to validate tire speed ratings and…

Battery electric vehicles (BEVs) continue to push the boundaries of driving range and efficiency. To keep pace, testing standards must evolve to accurately measure energy consumption and range without placing excessive burdens on laboratories. SAE J1634-2021, the latest revision of…

Static stiffness measurement of elastomeric components requires careful consideration of material behavior, test history, and precise procedures. This article summarizes key guidelines from SAE J1636-2017 to help engineers achieve consistent and repeatable results. 1. Elastomeric Behavior and the Importance of…

This SAE Standard sets the benchmark for electronic probe-type leak detectors used in servicing mobile air-conditioning systems. Although the standard is stabilized—indicating mature technology—it remains essential for ensuring accurate and reliable leak detection in automotive service environments. Below we cover…

The SAE J1630-2011 standard establishes a recommended practice for static deployment testing of airbag module assemblies. It addresses driver, passenger, side, roof rail, and knee bolster airbags, providing a uniform method to produce repeatable and reproducible results for design verification,…

Fuel crossover lines on heavy commercial vehicles are vulnerable to impacts from road debris, which can cause fuel spills and create safety and environmental hazards. SAE J1624-2015 (formerly J1624_SEP2006) is a recommended practice that establishes procedures to evaluate the strength…

SAE J1626-2-2023 is the latest reaffirmed recommended practice providing a standardized road test procedure for trucks and buses equipped with air brake systems (GVWR > 10,000 lb). This procedure aligns with Federal Motor Vehicle Safety Standard (FMVSS) 121 to evaluate…

SAE J1626-2012 provides uniform, repeatable test procedures for measuring the braking, stability, and control performance of trucks, truck-tractors, and buses equipped with air or hydraulic brake systems. Stabilized in 2012 by the SAE Truck and Bus Brake Systems Committee, this…

SAE J1618-2011 is a stabilized recommended practice that defines a comprehensive test code for continuously variable transmissions (CVTs) used in passenger cars. Originally issued in 1994 and stabilized in 2011, this document represents a mature and well-established framework for evaluating…

SAE J1621 is a recommended practice that defines a uniform dynamometer test procedure for measuring the retarding capability of compression release brakes (engine retarders) in heavy-duty vehicles. This article explores the key aspects of the standard, its importance for consistent…