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

SIGNIFICANCE AND USE
This test method is used to evaluate automotive manual transmission fluids for thermal instability, which results in deterioration of synchronizer performance.
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.
SCOPE
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. When materials, products, or equipment are available only in inch-pound units, SI units are omitted.
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 and health practices and determine the applicability of regulatory limitations prior to use.
1.6 This test method is arranged as follows:

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Publication Date
30-Apr-2006
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ASTM D5579-06 - Standard Test Method for Evaluating the Thermal Stability of Manual Transmission Lubricants in a Cyclic Durability Test
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
An American National Standard
Designation: D 5579 – 06
Standard Test Method for
Evaluating the Thermal Stability of Manual Transmission
1
Lubricants in a Cyclic Durability Test
This standard is issued under the fixed designation D 5579; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope
Transmission Mounts 6.3
Oil-Circulating System 6.4
1.1 Thistestmethodcoversthethermalstabilityoffluidsfor
Oil Return Hole 6.5
use in heavy duty manual transmissions when operated at high
Air Pressure Controls 6.6
Drive System 6.7
temperatures.
Instrumentation 6.8
1.2 The lubricant performance is measured by the number
Thermocouple Placement 6.9
of shifting cycles that can be performed without failure of
Reagents and Materials 7
Safety 8
synchronization when the transmission is operated while con-
Preparation of Apparatus 9
tinuously cycling between high and low range.
Cleaning of Parts 9.1
1.3 Correlation of test results with truck transmission ser- Assembly 9.2
Calibration 10
vicehasnotbeenestablished.However,theprocedurehasbeen
Transmission and Test Stand Calibration 10.1
shown to appropriately separate two transmission lubricants,
Reference Oils 10.2
which have shown satisfactory and unsatisfactory field perfor- Reference Oil Test Frequency 10.3
Instrumentation Calibration 10.4
mance in the trucks of one manufacturer.
Shift Time Calibration 10.5
1.4 Changes in this test method may be necessary due to
Operating Procedure 11
refinements in the procedure, obsolescence of parts, or re- System Flush and Charge 11.1
Test Operation 11.2
agents, and so forth. These changes will be incorporated by
Shut-Down Procedure 11.3
Information Letters issued by the ASTM Test Monitoring
Transmission Disassembly 11.4
2
Center (TMC). The test method will be revised to show the Determination of Test Results 12
Failure Criteria 12.1
content of all the letters, as issued.
Shifter Fork Wear 12.2
1.5 The values stated in inch-pound units are to be regarded
Test Validity Determination 12.3
as standard. When materials, products, or equipment are Report 13
Precision and Bias 14
available only in inch-pound units, SI units are omitted.
Keywords 15
1.6 This standard does not purport to address all of the
Test Validity Calculations and Limits Annex A1
Test Kit Parts Annex A2
safety concerns, if any, associated with its use. It is the
HTCT Test Report Forms and Data Dictionary Annex A3
responsibility of the user of this standard to establish appro-
Manual Transmission Cyclic Durability Test Parts Annex A4
priate safety and health practices and determine the applica-
Inspection and Wear Measurements
bility of regulatory limitations prior to use.
2. Referenced Documents
1.7 This test method is arranged as follows:
3
2.1 ASTM Standards:
Section
Scope 1
D 235 Specification for Mineral Spirits (Petroleum Spirits)
Referenced Documents 2
(Hydrocarbon Dry Cleaning Solvent)
Terminology 3
E29 Practice for Using Significant Digits in Test Data to
Summary of Test Method 4
Significance and Use 5
Determine Conformance with Specifications
Apparatus 6
2.2 SAE Standard:
Test Transmission 6.2
4
SAE J308 Axle and Manual Transmission Lubricants
1
This test method is under the jurisdiction of ASTM Committee D02 on
3
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee For referenced ASTM standards, visit the ASTM website, www.astm.org, or
D02.B0 on Automotive Lubricants. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved May 1, 2006. Published May 2006. Originally Standards volume information, refer to the standard’s Document Summary page on
approved in 1994. Last previous edition approved in 2005 as D 5579–05. the ASTM website.
2 4
ASTM Test Monitoring Center, 6555 Penn Ave., Pittsburgh, PA 15206-4489. Available from Society of Automotive Engineers (SAE), 400 Commonwealth
This edition incorporates revisions in all Information Letters through No. 05-2. Dr., Warrendale, PA 15096-0001.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

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D5579–06
2.3 Military Standard: 5. Significance and Use
5
MIL-L-2105 Lubricating Oil, Gear, Multipurpose
5.1 This test method is used to evaluate automotive manual
2.4 Other Standard:
transmission fluids for thermal instability, which results in
6
GO-H Mack Trucks Oil,Gear: Multi-Purpose
deterioration of synchronizer performance.
5.2 This test method may also be utilized in other specifi-
3. Terminology
cations and classifications of transmi
...

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