Interesting. I have the LWX and rebuilt it back in the fall of 2024, if I recall correctly. Glad I did now that you tell me the parts are non-existent.

I actually bought an eBay donor and rebuilt that one as the X5 was my daily until recently. I have the OE LWX in my storage shed and was thinking of rebuilding that one too, amd selling it. Looks like it’s scrap now.

The mounts must be identical on the ATC500, hopefully? They didn’t change that with the facelift, right?

If so I would assume it can be installed. The only other showstopper may be the input shaft from the transmission as I imagine any other differences can be overcome by swapping parts that should be available (driveshafts?). The NV and LWX had different inputs (from the 5hp24) so there’s a chance the ATC input may be different as well. Cobra sold an input shaft for the NV that would allow it to be swapped in for an LWX.

My assumption is that since the 5hp wasn’t different between cars with different transfer cases, any input differences between transfer cases has to do with the length of the input shaft. If this is true, then I’m sure a too-long input shaft can be cleanly cut down to length by a machine shop and installed into the ATC case. I wonder if the cobra people would be willing to tell you of the input shafts are different, and if so, how? I. Sure if you were buying a rebuild kit they would.

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Current
Original owner 2002 E53 X5 4.4i to 4.6i swap
2026 G80 M3 6 spd
2025 G06 X5 50e
Former
1972 Audi Fox
1986 Saab 900S
1996 BMW Z3
1998 BMW E36 M3 Sedan
2004 BMW E46 M3
2006 Audi A3 Quatro
1993 Mopar 318 Jeep Grand Cherokee
2015 V6 Jeep Grand Cherokee