8.1L/4L80E swap into 84 Dually

[HotRodPC]

So there you go @az3plus3 . Your wanted 8.1/Allison combo was a factory option so you're looking at a direct swap if you can find a donor with that combo and get the ECM and harness.

 

[Jrgunn5150]

So there you go @az3plus3 . Your wanted 8.1/Allison combo was a factory option so you're looking at a direct swap if you can find a donor with that combo and get the ECM and harness.

I do have a separate TCM as well, all Allison trucks do to my knowledge.