ARB 10 spline

[lokka]

But when you look at a Toy conversion: Diffs ~$150 each, McNamara rear axels ~$660, McNamara front axels ~$660, Longfield CVs ~$500, RoverTracks Drive Flanges ~$200, plus lockers ~$1500 and fitting it all
...the 10 to 24 spline conversion sounds quite good.

where do you get longfileds for 500? are they 27 spline or 30?

Serg[/quote]

That's how much mine were from Longfields thru RoverTracks...but the Aussie dollar was 93cents at the time.

And they are 30 spline.[/quote]

You must have been one of the lucky ones before the ash hammer fell my bro got rover tracks longs too the lucky bugger i just cant see why the poms want so much for the same thing its just not fu^%$ng cricket

[Bush65]

...
EDIT - INTERESTINGLY... The CS area of a 1.31" toyota shaft is about 5% greater than a 24spl rover shaft. If you increase Dave's value (7468) by 5%, you get about 7900 - so in the ballpark for the 4340 stub failure.

Cross section area is proportional to diameter squared, but torsional strength is proportional to diameter cubed.

So diameter increase for 5% increase in area would give approx 7.6% increase in torsional strength.

[Bush65]

You can have the side gears broached to 24 spline, or fit the ARB side gears.

The rest of the ARB kit is only required if you want to upgrade to be the same as the arb 24 spline locker.

The 24 spline locker has larger diameter journals where the carrier bearings fit, compared to the 10 spline.

This gives a stronger carrier, but it is not necessary if you just want to upgrade to 24 spline axles.

I'm not sure if the bore of the carrier has to be increased for the 24 spline axles to clear.

[lokka]

You can have the side gears broached to 24 spline, or fit the ARB side gears.

The rest of the ARB kit is only required if you want to upgrade to be the same as the arb 24 spline locker.

The 24 spline locker has larger diameter journals where the carrier bearings fit, compared to the 10 spline.

This gives a stronger carrier, but it is not necessary if you just want to upgrade to 24 spline axles.

I'm not sure if the bore of the carrier has to be increased for the 24 spline axles to clear.

John i sused the sizes and no mods need to be done to the carrier all that is needed is the side gears and then its just a matter of pulling it out fitting the gears then refitting with some 24 spline axles

[Micka]

But when you look at a Toy conversion: Diffs ~$150 each, McNamara rear axels ~$660, McNamara front axels ~$660, Longfield CVs ~$500, RoverTracks Drive Flanges ~$200, plus lockers ~$1500 and fitting it all
...the 10 to 24 spline conversion sounds quite good.

where do you get longfileds for 500? are they 27 spline or 30?

Serg

That's how much mine were from Longfields thru RoverTracks...but the Aussie dollar was 93cents at the time.

And they are 30 spline.[/quote]

You must have been one of the lucky ones before the ash hammer fell my bro got rover tracks longs too the lucky bugger i just cant see why the poms want so much for the same thing its just not fu^%$ng cricket[/quote]

Mine aren't RoverLongs. They are 30 spline Toyo ones as I have a Toy Conversion in mine. I have RoverTracks 30 spline axels front and rear too.

[Yorker]

From the longfield website.

1st 2 results are:
Standard toyota CV (27/30 spline) - failed at bell
Welded/heat treated toyota CV (27/30 spline) - failed at 30spl stub shaft


EDIT - INTERESTINGLY... The CS area of a 1.31" toyota shaft is about 5% greater than a 24spl rover shaft. If you increase Dave's value (7468) by 5%, you get about 7900 - so in the ballpark for the 4340 stub failure.

OK thanks! I've been toying with the idea of swapping a set of FJ40 axles under my 88" or a 109 Ambulance- If I upgrade to longs and better rear axles it looks like the 88"(2.25d, F suffix Transmission, B suffix Transfer) will be well within a decent safety margin, probably not in the 109 though. (5.0l Ford V8, T-18 Trans, LT230 Transfer...)

http://www.moserengineering.com/Pages/axletech.html

[ISUZUROVER]

I thought all the bits were made here in AU not the US il have to give my arb mate another call and find out what the go is as 125 US each sounds stupid ....

AFAIK ARB manufactures (lockers) in both AU and US???

I have found that in most cases prices on ARB bits are much lower in the US (though that may have chaqnged now the exchange rate has...).

I think it is because of the larger market, and greater competition over there (and possibly cheaper manufacturing).

Cross section area is proportional to diameter squared, but torsional strength is proportional to diameter cubed.

So diameter increase for 5% increase in area would give approx 7.6% increase in torsional strength.

THANKS JOHN!!!

[ISUZUROVER]

You can have the side gears broached to 24 spline, or fit the ARB side gears.

The rest of the ARB kit is only required if you want to upgrade to be the same as the arb 24 spline locker.

The 24 spline locker has larger diameter journals where the carrier bearings fit, compared to the 10 spline.

This gives a stronger carrier, but it is not necessary if you just want to upgrade to 24 spline axles.

I'm not sure if the bore of the carrier has to be increased for the 24 spline axles to clear.

John i sused the sizes and no mods need to be done to the carrier all that is needed is the side gears and then its just a matter of pulling it out fitting the gears then refitting with some 24 spline axles

Thanks John. Chris - I found a few places in the US selling side gears for US$125 each (back then it was AU$140 each) - can't find them now though. I would be interested if you can find them for that price or less in OZ.

[uninformed]

[/quote]

That's how much mine were from Longfields thru RoverTracks...but the Aussie dollar was 93cents at the time.

And they are 30 spline.[/quote]

hahaha, i remember that 47 seconds the dollar was strong, i was smashing Ebay USA..... good times

Serg

[ISUZUROVER]

That's how much mine were from Longfields thru RoverTracks...but the Aussie dollar was 93cents at the time.

And they are 30 spline.[/quote]

hahaha, i remember that 47 seconds the dollar was strong, i was smashing Ebay USA..... good times

Serg[/quote]

I recall that I paid about $220USD for my longfields, and that was when I was earning E's - and e1 was about US$1.2.

[uninformed]

That's how much mine were from Longfields thru RoverTracks...but the Aussie dollar was 93cents at the time.

And they are 30 spline.

hahaha, i remember that 47 seconds the dollar was strong, i was smashing Ebay USA..... good times

Serg[/quote]

I recall that I paid about $220USD for my longfields, and that was when I was earning E's - and e1 was about US$1.2.[/quote]

220 each right????

got to love earning euros or pound sterling.... not that i have though


Serg

[Yorker]

Wasn't there 2 different versions of the ARB 10 spline locker? One was easier to convert to 24 spline than the other?

[edit]

I forgot I had this file from ARB usa maybe it is helpful:
Pre-1993 Land Rover factory 10 spline differentials are prone to two weaknesses that have been addressed by
Land Rover in the release of their later model differentials.
The first is that of the 10 spline axle shafts of the pre-1993 models which are far more prone to breakage due to
torque wind-up than the 25% larger 24 spline axle shafts of the post-1993 (and some pre-1993 V8 Defenders)
differentials.
The second is a design flaw inherent in the sizing of the bearing journal. Failure has been observed at the
bearing journal seat in all versions of the early differential centre, whether it be the factory original or a high
performance aftermarket replacement. Land Rover addressed this issue in its post-1993 differential by increasing
the inside diameter of the carrier bearing, therefore thickening the cross section of the bearing journal at the
failure point by a huge 50%.
NOTE : These breakages generally only occur in significantly modified vehicles
(i.e., larger tires and/or greater horsepower).
Those customers wishing to upgrade to 24 spline axle shafts to avoid both of these failure modes have two
options.
The first option is to upgrade to an Air Locker 24 spline Rover Differential (RD56). Post-1993 Land Rover 24
spline axle shafts and tapered roller carrier bearings (Timken #LM102949 / LM102910) will need to be sourced.
The second option is to convert their existing 10 spline Air Locker (RD03) to a 24 spline model (RD56) using the
set of components in the table below. Post-1993 Land Rover 24 spline axle shafts or suitable aftermarket axle
shafts will need to be sourced.
NOTE : Pre-1980 10 spline Rover differentials using 16 TPI Whitworth adjuster nuts may NOT be
substituted with, or converted to, an RD56 because of the outside diameter of their carrier
bearings (76.20mm dia).
NOTE : It is not possible to convert early-production RD03’s with a four bolt cylinder cap.


Components to Convert an RD03 to an RD56 Notes:
QTY DESCRIPTION PART # NOTES
1 FLANGE CAP 020406 1 Pinions must be replaced for this modification.
1 CYLINDER CAP ASSEMBLY 030124
1 SIDE GEAR 130106R 2 Bolts and locking tabs must never be re-used.
1 SPLINED SIDE GEAR 130306R
4 PINION GEAR 140101R 1 3 Timken #LM102949 / LM102910.
6 CYLINDER CAP RETAINING BOLT 200205 2
6 LOCKING TAB (8mm) 150401 2 4 Replace the thrust washers if worn.
1 SEAL HOUSING 080202
2 TAPERED ROLLER BEARING 160109 3 5 Use only BS130 Viton 75.
2 SIDE GEAR THRUST WASHER 151001 4
4 PINION THRUST WASHER 151101 4
2 SEAL HOUSING O-RING 160221 5

--------------------------------------------------

also fwiw:
----- Original Message -----
From: <gbrovers@aol.com>
To: <Matt Nelson>
Sent: Wednesday, July 05, 2006 2:48 PM
Subject: Re: ARB conversions


Matt
I sell a kit to convert an RD03 (10 spline) to an RD 26 (old style 24
spline). Cost is $249.95. I can knock a little bit off if you send me
the 10 spline side gears ($25).