What causes this to happen? is it fixable?

Is the nut that holds the flange on loose?

 

Is the flange loose on the shaft as you turn it back and forth?

 

If the nut is loose and the flange is still tight on its splines, then look up the torque for that nut and do it up. If it leaks you need a new oil seal in there first.

 

If the nut is still tight and the whole shaft has come out, you're up for another diff or a big rebuild.

the nut is still tight, what diffs fit in the wagons without mods? only other wagon diffs?

None of the KE70 sedan diffs, as they have mounts for the 5link suspension arms. I'm not sure which diffs swap around the cars with cart springs, the KE70 wagons, the Ke55s and older, all the mounts would be the same but the width of the diffs should vary a little.

 

So, do you reckon the bearings on the inside of the pinion have collapsed?

not sure, but i can't get the axles out so i can't check properly

The KE/AE Panelvan diffs will directly bolt in.

They are S series, Not BW, so tailshaft has to be changed to either ADM AE86, or the 1 piece that comes with Pano stock.

 

RN and LN 25 Hilux (if you can find one) also mate up, but bottom mount plates need to be modified, or new ones fabricated for larger U bolts.

These diffs are highly sort after and are getting extremely rare and expensive because of this reason and they can take high amounts of horsepower/torque and stand up to the task (and the fact they fit most early Rotary's)

Edited March 21, 201313 yr by 86Ali

I've been told the SR5 pickup differentials are a direct bolt in, Other the the 5 lug bolt pattern .

Hooe this helps .