Browse Standards J651_201506
Current Stabilized 2015-06-30

Passenger Car and Light Truck Automatic Transmission and Automatic Transaxle Test Code (STABILIZED Jun 2015) J651_201506

This Recommended Practice had defined a test procedure and process which gave a reasonably complete description of the efficiency and performance of a 20th century automatic transmission. With the introduction of electronic controls, the number of parameters which control the transmission’s operation have expanded extensively and these need to be defined for each test. The interaction between the transmission, the environment, the engine, the cooling and other systems have also made test definition very difficult and complex. Finally, the diversity, the rapid changes, and the component complexity introduced by electric and hybrid drive system combine with the above difficulties to make it impractical to define a Recommended Practice which could provide a meaningful description of performance and efficiency of 21st century automotive transmissions.

The existing Recommended Practice J651 is being stabilized to preserve the test procedures for future reference.

J651_201506
2015-06-30
Latest
Stabilized
J651_200506
2005-06-22
Historical
Revised
J651_199601
1996-01-01
Historical
Revised
J651_199101
1991-01-23
Historical
Revised
J651C_197906
1979-06-01
Historical
Revised

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