Wow glad your o.k, Hope this car is around when i come up for parts would be one tough little Y from what ive seen and herd.

Something I was taught a lot of years ago was to never get under a car that doesn't have something solid like stands, pile of rims, blocks of wood, etc.

Served me well yesterday, when my trolley jack collapsed rather spectacularly! Apart from an elevated heart rate and a bit of a ding in my spare wheel well, happy to report that I survived.

the other good news is that the diff is all in & done. I decided to run the standard 720 brake & rim setup for now and everything fits really well. Mechanically it's prettymuch finished once I do the tailshaft and the handbrake cable.

Only other things I need to do are change over to tyres (note in pics they have the massive profile tyres that came on the 720 rims), overhaul the drums to make sure they're working all good, and maybe give it a little bit of a prettyup with better wheelnuts etc.

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hey mate, hope that quake didn't hit you too badly...?

anyway i got the bearings etc removed today so will have a bit of a play with it all this evening.

Honestly, I would try to make up the 20mm with wheel fitment. The whole thing we're trying to avoid here is having to shorten the housing and axles. If you're shortening anyway, you may as well start with a better diff (meaning something with the correct stud pattern, disc brakes, and LSD options).

If it helps though, having just done a 'guesstimate' measurement the splined section is approx 32mm long & of that about 80% looks to be the engaged area.

I've got one of these diffs lined up for nix. (I have to go do a two hour drive, and take the whole ute though) How much unused spline do the axles have? 20mm per side is a whisker too much for me. After breaking an H165 axle, I want the bigger beefy axles that the H190 has to offer.

Well I've established that the tailshaft flange is:

(a) the same as a bluebird h190 (by eye only, yet to measure)
http://i.ebayimg.com/00/$(KGrHqYOKpEE0VpV8Mw1BN(vIGpiF!~~_12.JPG
copy & paste this as it's not recognising the link properly

(b) different to my 120y flange (rear diff, this is the borg warner apparently. front diff is the h190)



I will know more about brakes when I get my hands on a bearing press.

the rear tailshaft flange from the later jap assembled 120ys(h150) are the same as the 720 one. same with h165 flanges

R31 brakes are probably as better option to make fit the rear as they have a steel bracket so its a bit easier to mod than the alloy bluebird one
or vn commdore ones for that matter as they are pretty much the same thing but with a larger disc and more caliper offset

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so the difference in lengths is about 40mm...which is the same as 20mm a side right?

Tailshaft is basically the right length, but need to change the rear uni/flange over to suit the 720 diff and may as well shorten it a touch while you're at it - at least you have to change the flange in my case as I have the BW diff in my 120Y. May well be that the Nissan/Datsun diffs in the earlier 120Ys might even have the same pattern as the 720 diff, who knows.

Shock mounts are required - very simple change though as they're attached to the leaf mount not the housing itself so there's no risk at all of bending etc. Two little tabs on either leaf mount will be fine... 3mm plate probably heaps but I'll go 4-5mm while I'm going to the trouble of making them.

I'm changing to four-stud, so I'll need to have the stud pattern drilled and the centre machined down to match my wheels. I've decided I'll retain the standard 720 bearing setup, so all I need to do is modify/replace the backing plates, and organise brakes (probably 4st discs from a bluebird if they're easy to adapt).

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I don't think you pricks are listening, this is why I'm crapping on about it and gave it it's own thread :) :) :)

It bolts in, and it's approx the right length... end of story!!

I just went downstairs and measured it again for the 500th time... it's ~1230mm as a bare housing. Same measurement on the 120Y diff I have sitting two feet away, is ~1190mm.