Please help identify my diff

[Adsport]

Hi, I have a diff which I was told was an F series with lsd. Turns out it doesnt have LSD so I have been trying to get one to fit in.

I found an MA61 diff, reportedly F series and the crownwheel from my diff is too big for it.

So i got a GX81 LSD (same as MX83) and the crownwheel is to small !

the crownwheel that was on the welded centre measures 190mm (as close as i can measure) outer.

crownwheel uses 8 bolts to the centre.

this diff is a solid beam axle with a banjo type centre housing, the axles are 29 spline and its 1485 face to face.

I honestly have no idea what the diff is out of, as the guy that I bought it from runaway when I tried to get in contact with him. It has been converted to fit AE86.


can post images if needed.

[foamy]

Do you have all the numbers off the diff/housing? I have a F series ID chart floating around somewhere which might help identify what you have.

[dangdang]

The ma61's should all run F series centres, 7.5 inch crown wheel.

Pics would be good.

Also a handy chart....

Axle Search

[Adsport]

I've looked for markings, the pumpkin has "ND875" punched into it and a big "N1" cast into it aswell as a "19N" cast on there. do you know where I should be looking? a lot of this diff has been shaved and ground down, thusly making it even harder

[Adsport]

[4th surf]

I suspect looking at the photos (and also from going outside for a quick look under one) what you have is the rear axle out of a 40 series Hilux which are commonly modded to fit the AE86. Usually they had a 4.88 centre for the 4 speed and 4.3 for the 5 speed models and being the earlier type centre have a thinner crownwheel than the later Hiluxes which for some reason was used on all 4wds with 4.88 gears. Normally when fitting lokkas and stronger aftermarket gears these centres become "Surplus to requirements" as the fatter aftermarket gears won't fit. If you'd like to get in contact and pay a visit with the remains of your diff and an axle to confirn spline count I'm pretty sure that I've got a perfectly good 4 pinion LSD that can easily become yours and also a complete 4 pinion LSD 4.88 centre which was removed from a V8 Surf as part of a ratio change

[Adsport]

Very interested, PM coming your way.

[Cuzzo]

I thought hiluxes had 30spline axles though

[madmont]

I thought hiluxes had 30spline axles though

They do as well as having 10 bolts holding on the crownwheel
and I can only count 28 splines on the axle

[Ken_T]

It's a H190 (hitachi out of a nissan/datsun). It's not toyota at all! Picture below looks same as what you posted and is 29 spline.



from Tech Wiki - H190 : Datsun 1200 Club

[4th surf]

Looks like the dumb idea going thru my head may be the answer here

[Adsport]

wow thats crazy but I think you might be onto something there Ken_T. I worked out the diff ratio when i got it to 4.38 and that lists one at 4.375.

I'm in discussion with 4th about seeing if something he has will fit but if this turns out to not even be toyota then that attempt may not work either.

The wiki states that the ring and pinion suits 200sx, do you think this means S14 silvia? if so what would anybody think the likelyness of one of their diffs fitting? nissan is like a generic lego parts bin after all...

[Ken_T]

Look at the last picture you posted(the carrier with LD875 stamped in it), it looks to me as there is a hitachi symbol above the writing.

The 200sx is probably the original 200sx from the 80's like so or what we call a Gazelle. Our S14/S15 200SX is just an Australia thing (maybe europe), as america got 240SX for S14, Japan was Silvia. Depends who wrote it but S14/S15 is R200, S13 ran R180 or R200 depending on what model/spec so S14 diff is no go.

[4th surf]

I'm entirely with you on this train of thought Ken and it has actually jogged the memory quite a bit but most of the Sylvias (hatch) and Gazelles (Notchback) were gotten by "Car cancer" long ago (talking NZ here) but I seem to remember the Gazelles having IRS and Sylvia live axle. On a side note I can remember a customer trading his 350 HQ Prem in on one and coming in complaining how his new jap V8 was "Gutless". He was gutted when it was pointed out that it was only a 2 litre 4 with twin spark ignition. Apparently the salesman that sold him the car ended up in hospital for a while.

Ads is this axle intended for a 'rolla? If so from some very quick measure ups it looks like I do have the answer and that will lead to a practically indestructable rear end in the long term but pretty much bullet proof in the short term using stock "in the pile down the back" bits. Long term what I mean is to use some 4wd Hilux bits such as Longfield Axles, Yukon Grizzly Lokka (which while a bit like a Detroit locker works like an LSD for day to day driving and would be awesome for drifting/powercruise/burnouts) and Kodiak gears. in other words "Ford 9 inch..Eat your heart out". There's also a very nice disc brake conversion available from the Philippines of all places for the Hilux bum which Hoppers Stoppers sell (at a heavily inflated price and for some reason he thinks you need two calipers per side, I'm trying to get the wife to get her sister to go see the manufacturer but may have to check it out myself when we go over there next year). I did think about putting these thoughts in a PM but felt it was better to put it out there for all to see

[Adsport]

Yeah this was intended for my corolla, I've driven turbo road cars with "Lokka" diffs and I can't say that I'm keen on that idea especially given how aggressive my car is and how I have experienced those types of centres unload and go open wheel as soon as power is let off.

I'm interested in a long term solution but where I'm at is where the diff that I have if I end up using it will still need to be shortened somewhat. Unfortunately it seems that I have been brutally ripped by a forum user and am trying to deal with the situation in the meantime. I was originally told (as advertised) that the diff was an F series with LSD, its turned out to be well, this, with a locked centre. It's a long story but I'm stuck with this after forking out $1k for it so the easiest solution is the best for me at this time. The diff already has had a disc conversion but the internal handbrake assembly is missing bits inside and I have no idea how to get the cable linkages going at the moment (haven't even thought about it really)

A good friend of mine is a local Nissan guru and after sending him links to two of the images he instantly without prompting identified the diff as Ken did, and yes he concurs with the thought of the Hitachi symbol !


Thanks for all the responses so far ! its good to know that I can rely on the Toymods collective