Why would HP Tuners show no transmission or output-shaft speed after a 6L80 swap with mixed E38 and T43 operating systems?
Here is what the documentation says. Each point links to its source; tables and names vary by computer, operating system and tuning software.
- E38, E67, E78; LS2, LS3, LS7, L96; 2006-2015: Gen IV controllers communicate over CAN bus, and the separate engine and transmission controllers must run compatible operating systems to exchange torque and speed data. (LSX Magazine)
More in the swap tune checklist, or build a checklist for your swap with the tune checklist tool.
Confidence: medium — sources disagree or are limited; check the sources below.
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Sources