I have to come back and admit when I am wrong, I've been trying to study up more on the 4x4 system and it does sound like in the Cherokee Active Drive II system uses both a two-speed PTU and a two-speed RDM. I am a little confused about exactly how that works though and how it differs from our Compass Active Drive system despite both using a ZF9 transmission.
Animations I have seen of the Renegade lead me to believe our system uses a simple PTU that comes after the front differential, on the passenger side. So something like engine -> 9 Speed -> Front diff and from there sideshafts go out to the front wheels BUT between the front diff and the passenger-side front tire the PTU is jammed in there and forks off torque to send to the rear. I assume the FWD models just have a half-shaft where the PTU would be. A very simple, cheap, easy system for sure but highly limited in its capabilities.
The Cherokee would not be able to work that way and have 2 speeds, it would have to get into the two-speed PTU before the front diff (I would think), so power flow would be engine -> 2 speed PTU and then apparently the front diff is part of the PTU(?) and the rear propshaft is only driven at one speed but the Cherokee RDM has a second speed to match the low speed of the front diff/PTU combo?
Blah... I don't understand. The Compass and the Renegade and the Cherokee all have 2.4L engine options mated to a ZF9 but the casing and the way the two versions of the PTU hook up and take power must be significantly different somehow, or the animation I saw for the Renegade's system was highly inaccurate.
Anyways as far as this thread is concerned it makes me think you'd need the entire drivetrain from a Cherokee for sure, from the transaxle to the RDM. Without getting underneath and inspecting several variants we don't know if the transaxle casing varies from the Cherokee's with the low range to ours, it just seems likely that it would and I'm a bit concerned the mounts would be different as well.
I do see in the BCM configuration for AlfaOBD that you can set the drive type variant to single speed AWD, 2 speed AWD, or 2 speed with "Elocker", but just because you can set that doesn't mean it will actually pick it up and work. AlfaOBD has a lot of things that don't work or don't read right. For example, there is also an option to set the transmission variant but mine came from the factory set to "Jatco JF613E 4x4 2 speed PTU (DFN)/948 TE(COMPASS MP)" and we know that isn't correct!