I couldn't find a much G series diff info on here to start with so I figured I'll throw this up for those like me that may be running a bit more power than most and want to bullet proof their car as much as possible.
(if this has already been covered please let me know where to find it)

Century:
VG40:
Solid Axle (coils) G392: 8.0", 3.15:1, 2 pinions, Open
5x114.3 unknown Ventilated disc, 1 piston calipers

Cressida:
MX83:
Double Wishbone G313: 8.0", 3.90:1, 2 pinions, Clutch LSD
5x114.3 N/A Ventilated disc, 1 piston calipers
Comments: Only Grande models have LSD.

Double Wishbone G315: 8.0", 3.90:1, 4 pinions, Clutch LSD
5x114.3 N/A Ventilated disc, 1 piston calipers
Comments: Only Grande models have LSD.

Crown:
UZS131:
Double Wishbone G314: 8.0", 3.90:1, 4 pinions, Open
5x114.3 N/A Ventilated disc

Double Wishbone G314: 8.0", 3.90:1, 4 pinions, Open
5x114.3 N/A Ventilated disc

Double Wishbone G474: 8.0", 3.94:1, 4 pinions, Open
5x114.3 N/A Ventilated disc

Hiace:
RH10:
Solid Axle (leaf) G162: 8.0", 5.28:1, 2 pinions, Open
5x114.3 unknown Drum

YH50:
Solid Axle (leaf) G162: 8.0", 5.28:1, 2 pinions, Open
5x114.3 1470mm Drum

Hilux:
RN20:
Solid Axle (leaf) G142: 8.0", 4.87:1, 2 pinions, Open
5x114.3 1375mm Drum

RN40:
Solid Axle (leaf) G142: 8.0", 4.87:1, 2 pinions, Open
5x114.3 1410mm Drum

Soarer:
MZ20:
Double Wishbone G295: 8.0", 4.10:1, 4 pinions, Clutch LSD
5x114.3 N/A Ventilated disc, 1 piston calipers

Supra:
JZA70:
Double Wishbone G299: 8.0", 4.10:1, 0 pinions, Torsen LSD
5x114.3 N/A Ventilated disc, 1 piston calipers

Double Wishbone G319: 8.0", 3.90:1, 0 pinions, Torsen LSD
5x114.3 N/A Ventilated disc, 1 piston calipers

MA70:
Double Wishbone G305: 8.0", 3.72:1, 4 pinions, Clutch LSD
5x114.3 N/A Ventilated disc, 1 piston calipers

Double Wishbone G315: 8.0", 3.90:1, 4 pinions, Clutch LSD
5x114.3 N/A Ventilated disc, 1 piston calipers

I found all this info here: