2.6, 2.3TD, 2.5TD & 2.5TDI (some) :-
front axle = 25 spline, 29mm diameter, diff = 7.25" diameter (low pinion)
rear axle = 28 spline, 30.5mm diameter, diff = 8" diameter

3.0V6 :-
front axle = 28 spline, 29mm diameter, diff = 8" diameter (low pinion)
rear axle = 28 spline, 30.5mm diameter, diff = 9" diameter

Gen 2

3.0V6 :-
same as Gen 1 except for NH & NJ auto has 7.25" diameter front diff (high pinion) NH & NJ 5sp man has 8" diameter front diff (high pinion)

2.5TDI :-
same as NH & NJ auto

3.5V6 & 2.8TDI :-
front axle = 28 spline, 29mm diameter, diff = 8" diameter (high pinion)
rear axle = 31 spline, 33.5mm diameter, diff = 9.5" diameter

Gen 3

3.5V6, 2.8TDI, 3.2DID, 3.8V6
front axle = 28 spline, 29mm diameter, diff = 8" diameter (high pinion)
rear axle = 33 spline, 36mm diameter, diff = 9.5" diameter

Note :- Mitsu factory Aisin manual hubs (found on some models - Gen 1 or Gen 2 base models & Tritons) are interchangeable and will retrofit to all Gen 2 models with super select.
These will not fit to a Gen 3 model as they run solid one piece hub flanges (non-removable).