Ford has changed engine and gearbox I think, interesting the Holden ran 2nd but I think loads need to be more realistic, I want to know tranny temps and I don't think 2lt engines will really go the distance in the long run working them pretty hard...................... Son with a BT50 manual says he wished he had an auto as the manual has poor low gears for hills and manouvers with a big van on the back.
I am with you @Drover regarding the durability of a 2 litre donk pulling 3 to 3.5 tonne load over longer times and in harsh conditions, no matter how many gears it has. It still has to go through them to get up to pace and be able to hold that pace too, and that usually means higher engine speeds. Yes, the trannie temps would be interesting to record on some long hard pulls with a few twists and turns to cause the gear box to work hard, even if manually selected. IMHO, a 3 litre turbo charged with 6 speeds would handle the work for much longer periods without less servicing problems in the long run.