Ok. Lock, singular. But still. Before proceeding with ordering the stuff needed to install the diff lock linkage on the Landy, I wanted to confirm I actually had the hardware. This proved oddly difficult.

I’ve tried multiple times to find the serial number of my transfer case, but never had any luck. Finally today I got angry and asked my friend (who operates a local Swedish shop near work) if I could borrow a lift. He agreed, and I headed over during lunch.

After getting under the car and completely inspecting the transfer case I figured out why I couldn’t locate the serial number.

No really, get out of the comments. I know where it should be on both models of transfer case and it isn’t in either of those places. There isn’t one. See:
 

Insert serial number here?

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My best guess is it is some sort of aftermarket and/or rebuilt case? I have no idea.

Anyway, undeterred I looked up diagrams of the case and managed to find the right place to wedge my phone to see this little baby.

That little thing right there. That is what all the fuss is about.

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Yup. Thar be a diff lock nipple thingy.

Just to make sure, I grabbed a 10mm wrench, threw it on there and twisted. After a short travel I heard and felt a very satisfying click. Top-side, we started the car are were rewarded with...

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So, long story short (too late), I have diff locks and they work. Time to buy the linkage!

...

...

Out of stock.

Shiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiit.

[UPDATE] Found a 2004 D2 linkage on eBay for a reasonable price, so I am going that route. We’re back on!