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Hydrodynamic Drive Test Code

Automatic Transmission and Transaxle Committee
  • Ground Vehicle Standard
  • J643_201812
  • Current
Published 2018-12-05 by SAE International in United States

The range of test conditions on the dynamometer shall be sufficient to determine the primary operating characteristics corresponding to the full range of vehicle operations.

Planetary Gears - Terminology

Automatic Transmission and Transaxle Committee
  • Ground Vehicle Standard
  • J646_201807
  • Current
Published 2018-07-12 by SAE International in United States
Figures 1 through 5 illustrate in simplified form some of the more common planetary gear arrangements in order to establish applicable terminology. Figures 6 and 7 provide additional examples that use elements of those gear arrangements. Gear ratio is the numerical ratio of input to output speed.
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Automatic Transmission Functions—Terminology

Automatic Transmission and Transaxle Committee
  • Ground Vehicle Standard
  • J649_201803
  • Current
Published 2018-03-23 by SAE International in United States
The following is a list of the most common terminology used in describing automatic transmission functions.
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Low Speed Continuous Slip SAE No. 2 µPVT Procedure

Automatic Transmission and Transaxle Committee
  • Ground Vehicle Standard
  • J2964_201801
  • Current
Published 2018-01-30 by SAE International in United States
This SAE document is intended as the definition of a standard test, which may be subject to frequent change to keep pace with experience and technical advances. This should be kept in mind when considering its use. The SAE No. 2 friction test is used to evaluate the friction characteristics of automatic transmission plate clutches with automotive transmission fluid combinations. The specific purpose of this document is to define a µPVT test for the evaluation of the variation of wet friction system low speed slip characteristics as a function of speed, temperature, and pressure. This procedure is intended as a suggested method for both suppliers and end users. The only variables selected by the supplier or user of the friction system are: Friction material Fluid Reaction plates Oil flow (optional) These four variables must be clearly identified when reporting the results of this test. If any of the test parameters or system hardware as described in this document are changed, other than the friction material, test fluid, or reaction plates, the data may not be…
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Automotive Transmission Terminology

Automatic Transmission and Transaxle Committee
  • Ground Vehicle Standard
  • J645_201708
  • Current
Published 2017-08-25 by SAE International in United States
The following listed definitions are intended to establish terminology and criteria for describing the various kinds of automotive transmissions. A specific arrangement may be described by a combination of several of these definitions.
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Automatic Transmissions - Manual Control Sequence

Automatic Transmission and Transaxle Committee
  • Ground Vehicle Standard
  • J915_201703
  • Current
Published 2017-03-09 by SAE International in United States
The scope and purpose of this SAE Recommended Practice is to provide a standard pattern or sequence for the manual control of automatic transmissions in passenger cars and light-duty trucks. This generally refers to left hand drive mechanical shift applications.
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Park Standard for Automatic Transmissions

Automatic Transmission and Transaxle Committee
  • Ground Vehicle Standard
  • J2208_201605
  • Current
Published 2016-05-26 by SAE International in United States
To provide a Recommended Practice for validating the function and integrity of an automatic transmission park mechanism with its associated control system and environment.
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Cast Iron Sealing Rings (Metric)

Automatic Transmission and Transaxle Committee
  • Ground Vehicle Standard
  • J1236_201509
  • Current
Published 2015-09-02 by SAE International in United States
The purpose of this SAE Recommended Practice is to establish guidelines for the automatic transmission and hydraulic systems engineer to design cast iron sealing rings and select acceptable width, thickness, coatings, and other accepted design details.
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Passenger Car and Light Truck Automatic Transmission and Automatic Transaxle Test Code

Automatic Transmission and Transaxle Committee
  • Ground Vehicle Standard
  • J651_201506
  • Current
Published 2015-06-30 by SAE International in United States
The extent of test conditions on the dynamometer must be sufficient to determine the efficiency characteristics corresponding to the following range of vehicle operations in all gear ratios with locked torque converters (open converter can also be done where appropriate and noted). a Efficiency versus output speed versus input torque b Torque ratio versus output speed c Input speed versus output speed d Output torque versus output speed e Parasitic loss versus input speed (spin losses) f Cooler flow g Output torque bias (front wheel drive transaxles)
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Automatic Transmission Hydraulic Pump Test Procedure

Automatic Transmission and Transaxle Committee
  • Ground Vehicle Standard
  • J2311_201503
  • Current
Published 2015-03-17 by SAE International in United States
This SAE Recommended Practice provides a method to determine the performance characteristics of the hydraulic oil pumps used in automatic transmissions and automatic transaxles. This document outlines the specific tests that describe the performance characteristics of these pumps over a range of operating conditions and the means to present the test data. This document is not intended to assess pump durability.
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