T43 to E67 Comms

I have a few unknown things happening in my latest conversion, LS3 E67 crate engine package to 6L80E T43 converison.

If I load certain PIDs from the TCM perspective, eg: output speed, brake pedal. I get the output speed reading, the brake pedal input seems to be inactive. Yet when I load the PIDs from the ECM perspective, I get the brake pedal reaction, the trans output speed reading is 0.

I have verified my wiring and connections with multimeter, test light etc.. so I am 99.99% sure it's not a connection problem.

Also, sometimes after a full flash it will select a gear and drive, other times it won't. The ECM seems to hit a rev limit of 4500RPM which wasn't there previous to the conversion.

Do I have mismatched TCM-ECM OS's?

Cheers

OONDY