SilverLeaf Electronics, Inc.
2490 Ferry Street SW.
For general business e-mail lori (at) simply-smarter.com.
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"Transmission Oil Temperature" is supported on J1708/J1587 Allison 3000/4000 Series Transmissions built before 1998.
"Transmission Oil Temperature and Gear Selected/Gear Obtained" are supported on J1708/J1587 Allison 3000/4000 Series Transmissions built from 1998 to 2005.
In 2005, Allison changed the electronics in the 3000/4000 Series Transmissions to ONLY support J1939, which VMSpc does not support.
It is my understanding that in 2008, Allison has added back in the J1708/J1587 support to their 3000/4000 Series Transmissions.
Allison 2000 Series Transmissions are non electronic, and do not support J1708/J1587 or J1939.