The FS5W71C gearbox is easy to identify, as it has the bolt-on plate as part of the shifter mechanism.

As far as which cars used it here, all RB,SR & CA powered vehicles (possibly with the exception of the S3 910) use the C series. I don't believe that it was standard fitment to any FJ20 powered cars. BUT, you can fit the B series bellhousing to the C series extension housing. This has been done to a few FJ & L powered cars here in AUS & is more common in Japan (especially with DR30 Skyline owners). the output shaft splines are the same all the way through - from the 4-speed A series to the latest C series (dunno about the 350Z box though).

This is why trying to ID Nissan boxes by model etc with 100% certainty can be impossible, unfortunately. While both my FJ20DET boxes look the same from outside, both have the B series type shifter arrangement, the guts are different. The heavy one has certain C series parts that do not fit the B series.

Got any idea what the ratios for the C series Skyline/Pintara are, Ben? I need a spare C box with reasonably close ratios.

Interesting that the C internals are fitted to the B casing.

I can find out about the R31 (domestic) ratios, but not until early next week.