Leaderboard

Unplug the blower motor and see if you have 12v at the connector when the fan is supposed to be on. If the blower motor has power, but doesn't go, it's probably dead. If not, then start digging around in the service manual (free download here) to find which fuses/relays/etc you're after. You want the HA section. Hopefully it's something simple and not an issue with the HVAC head.

Usual disclaimer, I haven't had an R200A apart. But I had a look at the manual, and here's how I think it goes. The first time, you're removing the long-side axle shaft, the bearing, and the flange that holds the bearing (labelled "extension tube retainer" on PD-18) all together. While it's out, you cut the collar which (I'm guessing) holds the bearing in place on the axle shaft. Then you bolt the extension tube retainer back to the axle tube to hold it (and the bearing) while you draw the axle out of the bearing with the slide hammer. I don't know why they have you bolt it back up rather than using a bearing splitter and a press. It could be that it comes out easily enough with the slide hammer that setting up the press would be an unnecessary hassle, or maybe they thought the extension tube retainer might break if it wasn't bolted down in four places while it got yanked on.

Sometimes it's just easier to buy something pre made, with a warranty, that I don't have to worry about grinding, ensuring all the welds don't rust and that it's square (Not that doesn't happen with pre fab either). Built vs bought has it's place but the majority of Nissan owners are cheapskates. Though I will say it is far worse with the first gen xterra groups. Every time someone tries to pitch a product they get torn apart by the "I can build it myself for less" crowd, and there you have it, no aftermarket.

According to ARB, the R230 and H233B use the same 33-spline (both in spline count and axle shaft diameter). That front Patrol unit won't work because it's 31-spline. It's possible the 33-spline unit would fit an R230 carrier, given how close dimensionally they might be, but even if it does the R51 stub shafts use retaining clips to stay in place and it's unknown if it would clear the Lokka's side gears, or if the edges are chamfered to aide installation or removal, among other potential issues. Air locker options exist. ARB (RD137) or a cheaper TRE 4x4 (TR137), assuming you have 3.54 or higher numerically gears.