Diff's mechanical or viscous

[Ian B]

Hi Everyone, 

I'm quite new to this forum so please go easy on me if i'm asking a stupid question.  I've recently broken a 2006 Convertible with 41k genuine miles and put the rev up Engine, cd0009 gearbox, steering, clocks & door panels etc in my old sunset coupe and i still have the low mileage diff sitting here but alas without any driveshafts, which i would guess are pull out as opposed to bolted.  From looking on here and the internet i think the 41k diff is mechanical (Breaker was an  06 UK GT ) and my diff i'm guessing is viscous being an 04 UK GT. 

My original diff has no leaks, makes no noise and locks up fine but needs new bushes whereas the 06 is far lower mileage and the bushes are like new. .  

If i'm right above i'm reluctant to swap it out as a:  i'm guessing my shafts won't fit and b:  i fitted a thorsen diff which i believe is like the mechanical one on my old E30 24 valve and i definately preffered my original clutched LSD on that as the Thorsen only worked when both sides had grip and tried to kill me when i fitted it so i swapped back to the Clutched one on that . 

Does anyone with a bit more experience of the Z's know if i'm correct in the assumptions i'm making above and if i am missing something please ?  

Car is mostly used for fast road driving as opposed to track or drifting. 

 

Many Thanks  Ian