Swapping diff side gears from 24spline to 10spline

[Scouse]

It looks like I've lost another 10spline diff in my '87 RR on the weekend.
I should have another spare diff which I can use (just need to dig it out)but I have several 24spline diffs from late D1s.

I would like to convert my diffs to 24spline jobbies but I don't have the axles & hubs yet. In the meantime I would like to convert one to a 10spline as a back up diff.

Is it possible to change over the side gears in the later diffs to fit the early 10spline type?
Or am I just making life hard for myself?

Over to the diff gurus........

[Slunnie]

I really dont know the answer, but I would bet that it'd work. The planetary gears may have to go over also. It'd be intereting to try it while its out.

[rovercare]

Just swap the crown wheel over on the carrier, depends on bearing sizes, they vary to:D

[Slunnie]

Just swap the crown wheel over on the carrier, depends on bearing sizes, they vary to:D
Crownwheel or sun gear?

[Scouse]

Just swap the crown wheel over on the carrier, I would like to use the late D1 carrier if possible due to the fact that the RR ones are now not much chop :(.


Looks like I'll try the swap & see what fits (and what doesn't).

[Slunnie]

I would like to use the late D1 carrier if possible due to the fact that the RR ones are now not much chop :(.


Looks like I'll try the swap & see what fits (and what doesn't).
Good stuff! Be interested to see pics if you take them too.

[Ace]

Hi Scouse, i remember when i did my diff up mt airlie that weekend and lokka helped me rebuild it we stuffed around trying to put a 24 spline hemishpere from CAL415's disco after he fitted the locker into a spare rangie classic carrier and the bearings were different so we couldnt do it. Not sure if the gears can be swapped over though.

I would just whack the make do with the 10 spline spare you have and when you get the axles and stuff just swap over the whole carrier. Matt

[Ace]

Or you could just get a locker :D

[Scouse]

I'm tempted by the strength alone of a locker diff being 4 pin.

I'm not keen on having a locker though - I know it makes life easier but that takes all the fun out of it :).

[dullbird]

I always think that fitting lockers starts to make you think you can go anywhere....hence getting yourself in to more tricker situations were your likely to break stuff. situations which you wouldn't normally find yourself with a reasonably standard car

needless to say I would like one in the rear eventually :D

[Ace]

I try to avoid situations like that, i fitted the lockers to prevent doing diff centres in the future. They do make life easier and i have them front and rear, but if i could go back in time i would of saved the money and not put on in the front, the rear locker does 99% of what i want to do, the front locker just makes it boringly easy.

Just do it scouse and dont use it till you get stuck :D

[Slunnie]

I'm tempted by the strength alone of a locker diff being 4 pin.

I'm not keen on having a locker though - I know it makes life easier but that takes all the fun out of it :).
Another option may be to grind the axle housing and fit a P38 diff??? Of course that means you'll need to convert to 24 spline.

[Bush65]

I'm tempted by the strength alone of a locker diff being 4 pin.

I'm not keen on having a locker though - I know it makes life easier but that takes all the fun out of it :).
No fun in breaking the weak little shaft for the diff pinions, and all of the collateral damage that results. :(

Lockers are worth it just for the strength in the 4 pinion design IMHO.

I used tru-tracs in my disco to get away from this problem. I could have fitted lockers but didn't need any better than tru-tracs as I have a rangie for hard stuff.

[lokka]

Yep like john said the lockers are the go just for the strength in the carrier i have the 10 spline locker in the rear and dont have it plumbed up and now i dont bust rear diffs tho ive twisted a few axles never snaped one tho as i know the limit i can push the std axles :D:D

[rovercare]

i know the limit i can push the std axles :D:D

Drivein out the drive, with anything bigger/more aggressive than a 31" AT:confused:





:D

[Disco_owner]

It looks like I've lost another 10spline diff in my '87 RR on the weekend.
I should have another spare diff which I can use (just need to dig it out)but I have several 24spline diffs from late D1s.

I would like to convert my diffs to 24spline jobbies but I don't have the axles & hubs yet. In the meantime I would like to convert one to a 10spline as a back up diff.

Is it possible to change over the side gears in the later diffs to fit the early 10spline type?
Or am I just making life hard for myself?

Over to the diff gurus........

Scott , I have a whole rear Diffs Housing from a Disco1 sitting in Garage , if you can swap the who housing over , you're more than welcome to have it :)

[POD]

I'm pretty sure there are variations in the bearings from early to late 10 spline diffs, not just from 10 spline to 24, so possibly a later 10 spline carrier might be compatible with 24 spline bits or vice-versa. I had my locker rebuilt (paid someone to do it- big mistake) after the crown wheel bolts came loose with ugly results, had a diff in the shed, both 10 spline but the bearings and housings were different, different O.D. and thickness in the carrier bearings if I remember correctly.

[Scouse]

Scott , I have a whole rear Diffs Housing from a Disco1 sitting in Garage , if you can swap the who housing over , you're more than welcome to have it :)Thanks Khos.
I assume by housing you're referring to the axle casing itself (that the diff assy fits into). The housing isn't the problem in the changeover to 24spline, it's the stub axles, hubs & axles themselves that I need to convert over.
Thanks all the same though :).

I can get a new ARB locker through work at a fairly decent price so I'll probably go that way if I save my pennies.

[Bush65]

I'm pretty sure there are variations in the bearings from early to late 10 spline diffs, not just from 10 spline to 24, so possibly a later 10 spline carrier might be compatible with 24 spline bits or vice-versa. I had my locker rebuilt (paid someone to do it- big mistake) after the crown wheel bolts came loose with ugly results, had a diff in the shed, both 10 spline but the bearings and housings were different, different O.D. and thickness in the carrier bearings if I remember correctly.
The early diffs with whitworth threads on the adjusting nuts are not compatible.

The 24 spline diffs have larger bore bearings, but AFAIK the OD of the bearings is compatible with the metric 10 spline diffs.

[ashtrans]

Hi Scott,

you can't just swap the side gears as the location diameter on the back of the gears are different,

if both diffs are metric you can change the whole diff centre but as john mentioned the bearing ID's are different between the 10 and 24 spline but OD's are the same,

to check if they are metric or imperial, have a look at the head of one of the 4 journal end cap bolts, if they have '8.8' written on them they are metric, imperial was pre 1983,

Dave

[Scouse]

Thanks for the info Dave. That saves a bit of time mucking around to find they won't fit.

It looks like I'll get the bits & pieces to convert the rear end to 24spline instead. It just means I have to do it sooner rather than later as planned :(.

[Disco_owner]

Thanks Khos.
I assume by housing you're referring to the axle casing itself (that the diff assy fits into). The housing isn't the problem in the changeover to 24spline, it's the stub axles, hubs & axles themselves that I need to convert over.
Thanks all the same though :).

I can get a new ARB locker through work at a fairly decent price so I'll probably go that way if I save my pennies.

yes , this includes the axles and hubs :) it's a whole assembly Disc-Disc.

[ashtrans]

you will fine the sun gear journal is bigger on the 24 spline sun gear, so to fit a 10 spline into a 24 spline center you will need to 'bush' the sun journal. Just not worth the hassle unless you'r really in trouble.

Ian Ashcroft

[Scouse]

yes , this includes the axles and hubs :) it's a whole assembly Disc-Disc.You beauty - phone call on the way :arms:

[Scouse]

I would like to publicly thank Khos (Disco owner) for his generosity in donating his old Disco rear axle assy to a worthy cause. I can now convert my RR rear end to 24 spline :).


Now, off to find the tread on converting to oiled bearings......

[discowhite]

I always think that fitting lockers starts to make you think you can go anywhere....hence getting yourself in to more tricker situations were your likely to break stuff. situations which you wouldn't normally find yourself with a reasonably standard car

needless to say I would like one in the rear eventually :D


that could have been worded abit better hey lou?

cheers phil

[Scouse]

He he, I've been wanting someone to say something for days over that comment !!

[350RRC]

Freudian slip diff?

[rovercare]

Nice work Khos:)

[dullbird]

that could have been worded abit better hey lou?

cheers phil


Phillip you have a dirty mind........

but in regards to that comment yes i would like a locker as well :angel:

[dirtdawg]

do you have the link to converting the disco rear to oiled bearings ?? ;)

[Scouse]

do you have the link to converting the disco rear to oiled bearings ?? ;)Not yet, just wandering over to the Good Oil section to see if it's in there.

[Scouse]

There's a lot of info in here:
http://www.aulro.com/afvb/good-oil/63508-bearings-swivels-oil-fed-double-lip-seals-rest.html