Datsun : Z-Series 280ZX Coupe

Does anyone know what the RC39 after the FS5W71B means on the VIN plate? I think its on the ealy 280ZX models, but not sure.

Could it be the first version of the "close ratio" 71B's?

Just found the thread below that says it's the differential ID. RC39 is a 3.9 ratio R200. I can't find it supported in the FSM anywhere, but I've read that Nissan typically produced Service bulletins in addition to FSM's. Good to know though if you're looking for a certain ratio.

Identifying Your S12 *Last Update 22/12/07* - S12 Pinned Information - S12Silvia.com Community

I noticed the number 39 coincided with the diff ratio. It was maybe wishfull thinking that it was relat to the tranny. Thanks for the link, intersting info. I dont recall seeing it on the models after 81.

Chas