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ASTM D5579-19e1

Standard Test Method for Evaluating the Thermal Stability of Manual Transmission Lubricants in a Cyclic Durability Test (Withdrawn 2025)
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ASTM D5579-19e1

Standard Test Method for Evaluating the Thermal Stability of Manual Transmission Lubricants in a Cyclic Durability Test (Withdrawn 2025)

PUBLISH DATE 2019
PAGES 19
ASTM D5579-19e1

1.1 This test method covers the thermal stability of fluids for use in heavy duty manual transmissions when operated at high temperatures.

1.2 The lubricant performance is measured by the number of shifting cycles that can be performed without failure of synchronization when the transmission is operated while continuously cycling between high and low range.

1.3 Correlation of test results with truck transmission service has not been established. However, the procedure has been shown to appropriately separate two transmission lubricants, which have shown satisfactory and unsatisfactory field performance in the trucks of one manufacturer.

1.4 Changes in this test method may be necessary due to refinements in the procedure, obsolescence of parts, or reagents, and so forth. These changes will be incorporated by Information Letters issued by the ASTM Test Monitoring Center (TMC). The test method will be revised to show the content of all the letters, as issued.

1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

1.5.1 Exception—When materials, products, or equipment are available only in inch-pound units, SI units are omitted.

1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.7 This test method is arranged as follows:

  • Scope — Section 1
  • Referenced Documents — Section 2
  • Terminology — Section 3
  • Summary of Test Method — Section 4
  • Significance and Use — Section 5
  • Apparatus — Section 6
    • Test Transmission — Section 6.2
    • Transmission Mounts — Section 6.3
    • Oil-Circulating System — Section 6.4
    • Oil Return Hole — Section 6.5
    • Air Pressure Controls — Section 6.6
    • Drive System — Section 6.7
    • Instrumentation — Section 6.8
    • Thermocouple Placement — Section 6.9
  • Reagents and Materials — Section 7
  • Safety — Section 8
  • Preparation of Apparatus — Section 9
    • Cleaning of Parts — Section 9.1
    • Assembly — Section 9.2
  • Calibration — Section 10
    • Transmission and Test Stand Calibration — Section 10.1
    • Reference Oils — Section 10.2
    • Reference Oil Test Frequency — Section 10.3
    • Instrumentation Calibration — Section 10.4
    • Shift Time Calibration — Section 10.5
  • Operating Procedure — Section 11
    • System Flush and Charge — Section 11.1
    • Test Operation — Section 11.2
    • Shut-Down Procedure — Section 11.3
    • Transmission Disassembly — Section 11.4
  • Determination of Test Results — Section 12
    • Failure Criteria — Section 12.1
    • Shifter Fork Wear — Section 12.2
    • Test Validity Determination — Section 12.3
  • Report — Section 13
  • Precision and Bias — Section 14
  • Keywords — Section 15
  • Test Validity Calculations and Limits — Annex A5
  • HTCT Test Report Forms and Data Dictionary — Annex A6
  • Manual Transmission Cyclic Durability Test Parts Inspection and Wear Measurements — Annex A7

1.8 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

1.1 This test method covers the thermal stability of fluids for use in heavy duty manual transmissions when operated at high temperatures.

1.2 The lubricant performance is measured by the number of shifting cycles that can be performed without failure of synchronization when the transmission is operated while continuously cycling between high and low range.

1.3 Correlation of test results with truck transmission service has not been established. However, the procedure has been shown to appropriately separate two transmission lubricants, which have shown satisfactory and unsatisfactory field performance in the trucks of one manufacturer.

1.4 Changes in this test method may be necessary due to refinements in the procedure, obsolescence of parts, or reagents, and so forth. These changes will be incorporated by Information Letters issued by the ASTM Test Monitoring Center (TMC). The test method will be revised to show the content of all the letters, as issued.

1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

1.5.1 Exception— When materials, products, or equipment are available only in inch-pound units, SI units are omitted.

1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.7 This test method is arranged as follows:

  • Scope — Section 1
  • Referenced Documents — Section 2
  • Terminology — Section 3
  • Summary of Test Method — Section 4
  • Significance and Use — Section 5
  • Apparatus — Section 6
    • Test Transmission — Section 6.2
    • Transmission Mounts — Section 6.3
    • Oil-Circulating System — Section 6.4
    • Oil Return Hole — Section 6.5
    • Air Pressure Controls — Section 6.6
    • Drive System — Section 6.7
    • Instrumentation — Section 6.8
    • Thermocouple Placement — Section 6.9
  • Reagents and Materials — Section 7
  • Safety — Section 8
  • Preparation of Apparatus — Section 9
    • Cleaning of Parts — Section 9.1
    • Assembly — Section 9.2
  • Calibration — Section 10
    • Transmission and Test Stand Calibration — Section 10.1
    • Reference Oils — Section 10.2
    • Reference Oil Test Frequency — Section 10.3
    • Instrumentation Calibration — Section 10.4
    • Shift Time Calibration — Section 10.5
  • Operating Procedure — Section 11
    • System Flush and Charge — Section 11.1
    • Test Operation — Section 11.2
    • Shut-Down Procedure — Section 11.3
    • Transmission Disassembly — Section 11.4
  • Determination of Test Results — Section 12
    • Failure Criteria — Section 12.1
    • Shifter Fork Wear — Section 12.2
    • Test Validity Determination — Section 12.3
  • Report — Section 13
  • Precision and Bias — Section 14
  • Keywords — Section 15
  • Test Validity Calculations and Limits — Annex A5
  • HTCT Test Report Forms and Data Dictionary — Annex A6
  • Manual Transmission Cyclic Durability Test Parts Inspection and Wear Measurements — Annex A7

1.8 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

5.1 This test method is used to evaluate automotive manual transmission fluids for thermal instability, which results in deterioration of synchronizer performance.

5.2 This test method may also be utilized in other specifications and classifications of transmission and gear lubricants such as the following:

  • 5.2.1 (final API designation of PG-1),
  • 5.2.2 Military Specification MIL-L-2105,
  • 5.2.3 SAE Information Report J308 Axle and Manual Transmission Lubricants, and
  • 5.2.4 Mack Truck GO-H Gear Lubricant Specification.
SDO ASTM: ASTM International
Document Number D5579
Publication Date May 1, 2019
Language en - English
Page Count 19
Revision Level 19e1
Supercedes
Committee D02.B0.03
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