I get this message and the local cummins/Allison shop says good guess no idea. Diagnostic History File Feel free to add notes to this file, but do not move or delete. SRC TPE ID MD COMPONENT MODE MM/DD/YY HH:MM ============================================================================= TRN SID 151 14 UNKNOWN COMPONENT Special Error 4/ 7/13 10:06

Submitted by Mark Overholser on Tue, 2013-05-07 16:53

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The TRN means Transmission and: "SIDs 151 through 155 are defined as “System Diagnostic Codes” and are used to identify failures that cannot be tied to a specific field replaceable component."