Woah. Interesting idea. Highrange might be a drama but the carrys didnt run large tyres so could be 1:1.

Lock the Carry case in 4wd and you've got a PTO.

Case length looks similar but will need a shorter jackshaft with 2 flanged uni's.

That's neat as, I hadn't seen how 4x4 carrys had the transfer. Thanks for posting. For my driving I'd love twin transfers. Standard/carry low range for sand and general trail driving, 4.16s in a sierra transfer for most trail obstacles and of course compound low for the odd times I'd like a gear that low.

Because we have reduction in high range on a Sierra you'd have to multiply carry low by the high range number if you were going to use carry low with the Sierra transfer in high. For stock 1.3l that's 1.87x1.409 = 2.63 or for 1l/4.16 high that would be 1.87x1.58 = 2.95. With 2.95 you'd still have a realistic 50+km/h cruising speed in low, that'd be a pretty sweet setup with a gear for every situation.

Seeing as it's passengers side drop you might even get away with not welding up the front output side, would depend on exhaust clearance. If you could a figure out a way to have 2wd low in the carry box you could use that front output for a PTO.

So with 4.1’s you looking at:
1.58 high
2.95 mid
4.1 low
7.67 extra low

That is a sweet range of gears that would work with a few different tire sizes.

If you are thinking of doing the twin transfer instead of gears your looking at:
1.4 high
2.26 mid
2.63 low
4.24 extra low

Not really that great. You could compensate with diff gears slightly, but your still going to be limited in tire size and crawl speed.

The other issue I see is the stress on the transfer. Having the torque multiplied by 1.87 before it hits the input shaft of the transfer isn’t going to give it an easy life, even in a 4.1 case

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All up much easier to fit an auto and have more drivability with less work.

Not sure on your Ratio Maths there ,,,, Its pretty simple stuff really
If i do it it will be a 1ltr transfer with 1.58 high ,, giving the little bit of gearing for tire size on the black top.
results for the setup in low
3.652 first
1.87 low-1 carry
2.51 low-2 sierra
3.9 diff
66.85-1 crawl ratio,,,,

A stock setup using aftermarket 4-1 transfer gears ,, gives the same ratio on the black top
stock with 4-1 setup in low
3.652 first
4 Low transfer
3.9 diffs
56.97-1 crawl ratio

Even using the 1.3 transfer in the duals gives a better crawl ratio at 60-1 then the 4-1s 56.97-1


lol

probly 225-75r 16 ,,, ,, will probly a be a simarler build type to a japanese style thing ,, it will be living on a car trailer towed behind our Bus-motor home ,, the boat rack is has a 2mtr clearance so height is restricted. as we all no so much stuff we do is a compromise between off and on road drivability,, ,, The story goes --we sold our house 5 yrs ago ,, and went for a drive ,and we never came back in a gu patrol tray top towing a van ,,, got bored with with the Van ,, brought a Bus and made the mistake thiniking i could live A-framing a terios behind it ,, i fish (sand work) and like propecting (steep stuff) and look at shit a say Hold my beer lol Steve (gwagon) knws me from outerlimits - as Dozoor , rockapes. did have an acc here few years ago but couldnt get back into it

Pic of the centre to center bolt spaceing mm for the transfer to transm -- yolk measurment, and lenght of case to yolk mating surface,,,,and the cable shifter for transmission (if the shift rods also could be retained)