Why will 62 split case not work behind FZJ trannys?

[SuperHatch]

Sure, but from my understanding the A3xxx and A4xxx trannies both bolt up to the same t-case (just with or without the VC).

Since they both can bolt up to the same t-case, what is the difference that prevents you from swapping the same parts to bolt them up to the split case?

The A440F, A442F, A443F (Not Toyota) are all transmissions in the Aisin Seiki AW450 series. They share a tremendous amount of parts, and their internal workings are nearly identical.

The A343F is a completely different transmission, although also made by Aisin Seiki.

While you are correct in that the transfer case bolt pattern and the output shaft have the same interface between the two transmissions, you need to think about the other end of the output shaft. The part that is inside the transmission. It is completely different between the two.

Look at the the attached images for the differences between the A343F, A442F, and A440F output shafts.

As you can see, the A343F is totally different than the A442F and A440F. The A440F and A442F, however, both have the same gear flange pattern at the end that interfaces with the transmission gearset.

 

[SuperHatch]

Furthermore, look in these threads...

A440F - https://forum.ih8mud.com/diesel-tech-24-volts-systems/268941-isuzu-4he1tc-into-fj62.html

A442F - https://forum.ih8mud.com/diesel-tec...shi-4d34-3at3b-diesel-swap-into-94-fzj80.html

A442F - https://forum.ih8mud.com/diesel-tec...shi-4d34-2at3b-diesel-swap-into-96-fzj80.html

All three cover swapping output shafts between different versions of these transmissions. They refer to converting a AW450-43LE (A443E, RWD 99-04 medium duty version of this trans) into a 4WD transmission, one for in a 62 series cruiser, the other two into 80 series cruisers.

The conversion we're talking about in this thread would be much easier, and the spacer that is referred to in those threads would not be needed. You would still need to machine the A440F extension housing for the A442F output shaft speed sensor, other than that, everything would bolt together.

See the attached pictures for differences between the A440F, A442F, and AW450 output shafts.

 

[OGBeno]

Great information SuperHatch.

I was going to post FSM tech info, but you did it for me significantly better.

-onur

 

[Walking Eagle]

that gear swap also changes your 4WH a bit..... so if you have stock gears and want lower ones for driving it would work.... i've already swapped mine and don't want lower gears for street driving.

You just need bigger tires then

 

[Walking Eagle]

How does it change the 4WH? Stock it's 1:1 for high, and the split case looks like it's the same.

IIRC- the high gear is 10%overdrive

Definately makes it a desireable swap - if not expensive. The lower high range is an atractive alternative to regearing axles and might offset the cost of regearing if a person wasn't running too tall a tire. I need more like a 28% reduction for my 37's, this would be more like going to 4.56's. Might be just enough to keep me from spending an equal amount on axle gears though. I like my AWD in the rain and snow/ice - but 4:1 low, reduced drag from part time case, and 10% reduction on street - I like all of those.... oh wait, I forgot, I'm selling my truck....


Would this also allow the use of a TOYBOX?

 

[69LC]

I've been looking for answers about swapping an A442F output shaft and tail housing to an A440F that I have sitting in my garage. I want to use a military 6.2 diesel with a non-electronic tranny mated to the HF2AV in my wife's '95 fzj80. If this is mechanically reasonable, how readily available are the 442 output shaft and tailhousing?

I had a diesel swap in mind when we bought the truck a couple of summers ago. I just want to have all of the parts on hand and ready to go in when I pull the trigger.