well i was under the impression that the speed sensor in the extension housing was still needed for the tcm, but in that case screw it, my truck has a electric speed sensor in the tcase ill just re-use in the gear drive tcase.
Are you swapping in the entire A340F wiring harness from a donor vehicle, you'll need to, unless you are a wiring genius? Not sure on yours but the extension housing stayed in place on mine. Is this a 4wd trans or a 2wd trans? I'm not picking but this swap is pretty involved if you want full automatic shifting with the TCM and the truck had a manual trans in it before.
This is what I removed-
This is what I bolted the adapter to-
And this bolted up.
