Differential - Ratios

Skyline:

Manual (lsd and open)  : 3.7

Automatic (lsd and open) :3.89

Pintara (not sure on manual)  : 4.11

GTS2 (both auto and manual)  : 3.89

Speedo is driven off the gearbox, therefore putting a manual gearbox with an auto diff will put the speed out 5% (speedo will read higher than actual car speed).