Identifying Terrano diffs/axles

[Tribune]

Finally got my "new" 1992 Terrano in the drive now. Starting to think about locking diff options, but first I need to identify what diffs/axles I'm running.

Of course, no sticker or plate on the door jamb so I'm kinda in the dark. And I'm not about to get out there in the dark and snow and start poking about until the weekend. All the info I can find on the net is for LHD North American WD21 Pathfinders.

So anyone here can help me out? Or point me to a resource that can?

For info, its a 1992 WBYD21 Terrano R3m diesel TD27t with rear disc brakes. If it was a North American WD21 Pathfinder, I'd hazard a guess at a 31 spline H233B in the back and the R200 in the front.

Cheers
Mark

[u13turbo]

Hey mate, Pop your bonnet, and on the drivers side firewall, keep following around onto the gaurd, you will see a tag there, somewere on it it will say something like ca48 or hg46 i think it is. Post that code up here and someone will let you know what it is.

[Tribune]

Thanks mate. Found the plate! HG46
And that, according to a post on the Nissan Infinity Car Owners forum tells me I do indeed have the H233B - R200 set-up. I can start thinking about air lockers now.
Sweet.

[u13turbo]

Good stuff. Same as mine, 4.6 ratio too if you didnt know. Pretty sure theres a guy that does good deals on lockers.

[slide]

Being diesel its much more likely to have the r180a front diff than the r200a.
Rear will be the h233 tho. And 4.6 ratio going by your tag

[Tribune]

Being diesel its much more likely to have the r180a front diff than the r200a.
Rear will be the h233 tho. And 4.6 ratio going by your tag

Newbie question, but how can I tell the difference between an R180a and an R200a visually?

[slide]

If you look at the main nugget, theres a flange for axle to join close to it on passenger side, and a extension 'tube' out towards drivers side axle flange. The r180a 'tube' has a bolt flange up next to the nugget, r200a doesn't and sidebyside r200a is visually bigger than r180a. Hope that makes sence
I don't know how to post up pics sorry

[Tribune]

Thanks mate

I'll get under there and tomorrow morning and take a squint at the diff. Too bloody cold to be rolling around in the snow right now though!

[keithal]

my 3dr non turbo has CA48 correct me if im wrong but this is a c200 rear diff?

and would it be 29 spline or 31?

have searched a bit but cant find the answer

thanks Alex

[slide]

Yea, ca48 will be c200 rear and r180a front.
The rear is easy to see, as it has a removable 'hat' on rear of diff to access gears, rather than having to pull whole nugget with the h233 rear diff.
I think its more likely to be 29 spline- but don't quote me.
May have to pull out an axle and count them.

[keithal]

Yea, ca48 will be c200 rear and r180a front.
The rear is easy to see, as it has a removable 'hat' on rear of diff to access gears, rather than having to pull whole nugget with the h233 rear diff.
I think its more likely to be 29 spline- but don't quote me.
May have to pull out an axle and count them.

cheers

[sibainmud]

Yea, ca48 will be c200 rear and r180a front.
The rear is easy to see, as it has a removable 'hat' on rear of diff to access gears, rather than having to pull whole nugget with the h233 rear diff.
I think its more likely to be 29 spline- but don't quote me.
May have to pull out an axle and count them.

cheers

Yip 29. Been down that track
This is what a c200 looks like. This was a CA48 3dr non-turbo.


Easy way to tell, does it have drum brakes for both hand and foot or the H233 have disc/drum combos.

Cheers,

[keithal]

Yea, ca48 will be c200 rear and r180a front.
The rear is easy to see, as it has a removable 'hat' on rear of diff to access gears, rather than having to pull whole nugget with the h233 rear diff.
I think its more likely to be 29 spline- but don't quote me.
May have to pull out an axle and count them.

cheers

Yip 29. Been down that track
This is what a c200 looks like. This was a CA48 3dr non-turbo.


Easy way to tell, does it have drum brakes for both hand and foot or the H233 have disc/drum combos.

Cheers,

yup looks exactly like that

[Tribune]

Lots of top notch info gentlemen, I appreciate it.

Definitely got the R180a under there.
Which brings me on to my next question . . .

How easy is it to swap in an R200a? I've got the full hub-to-hub assembly including CV axles, R200a diff, the works. Just sat there in my old dead WD21 Pathfinder that I'm using as my parts truck.

If I can get that R200 in there I can run ARB air lockers in the front, plus have a more burly 200mm ring gear (or crown wheel as you blokes at your end of the earth call it). Doesn't matter if the gear ratio is different to the back H233b 'cos I'll re-gear both when the lockers go in anyway.

Question is, will the R200 fit?

[charo249]

the C200 refers to the fact that the diff runs a 200mm crown wheel and I think in turn the C180 has a 180mm crown wheel so C200 centre may be to tight a fit in your current diff housing (Likewise the H233 diff has a 233mm crown wheel). From my research into the topic most 4cyl Pathfinders ran a C200 rear and a 180 front however the V6 and a select few high spec turbo diesel 4cyls ran the R200 front H233 rear. You will find the H233 to have 31 spline axles and front diff to have 29 splines. One thing to note is that H233 will most likely have a LSD centre you will have to change to an open diff centre to install most lockers (the diff centre out of the front of a GQ Patrol or if you can find one the rear diff centre from a MK/MQ Patrol will also fit).

P.s:If you search the ARB website you will find application charts for airlockers.