disco series 1 diff same as a s2.

Post by **andrew e** » Mon Oct 23, 2006 9:45 am

FYI.

Just found out somthing interesting. A s1 disco center will go straight into a series 2 and vice versa. The difference between the 2 are only very minor, one is a slight change in the thickness of the flange where it bolts on the housing, and the pinion flange is held on with a bolt instead of a nyloc nut.

Andy

Post by **Slunnie** » Mon Oct 23, 2006 11:27 am

I think the cross shaft and its fixing may also be slightly differently designed.

Post by **Reddo** » Mon Oct 23, 2006 12:15 pm

Could be wrong, but is not the spline count different on S2 ie, 10 spline on S1 versus 24 on S2?

We swapped S2 axles (24 spline) into our S1 and changed the diff centre to 24 also (JacMac locker).

Post by **Loanrangie** » Mon Oct 23, 2006 12:55 pm

Early D1's are 10 spline 93/94 up are 24 spline.

Post by **Slunnie** » Mon Oct 23, 2006 1:53 pm

Reddo wrote:Could be wrong, but is not the spline count different on S2 ie, 10 spline on S1 versus 24 on S2?

We swapped S2 axles (24 spline) into our S1 and changed the diff centre to 24 also (JacMac locker).

How? The Disco2 axles don't change over with the Disco1 axles. The Disco2 are semi floaters.

Ah,ok. I assume you mean the Disco1 post 94 axles which were the 24 spline ones.

Post by **Utemad** » Mon Oct 23, 2006 7:27 pm

The RD56 air locker fits both S1 and S2 24 spline Discos. The RD57 is used on the rear of S2 Discos after a certain date.
Going by memory at least.

So that must mean they are pretty darn similar.

Post by **Reddo** » Mon Oct 23, 2006 8:18 pm

How? The Disco2 axles don't change over with the Disco1 axles. The Disco2 are semi floaters.

Ah,ok. I assume you mean the Disco1 post 94 axles which were the 24 spline ones.

you are probably right here, I'm going on the advice from the wreckers who told me they were from a D2. What's the actual difference then?

Post by **Reddo** » Mon Oct 23, 2006 8:25 pm

I should say that I understand the differences between semi and full floater, but was unaware that all D2s had semi-floating rears??

Post by **Slunnie** » Mon Oct 23, 2006 9:59 pm

Utemad wrote:The RD56 air locker fits both S1 and S2 24 spline Discos. The RD57 is used on the rear of S2 Discos after a certain date.
Going by memory at least.

So that must mean they are pretty darn similar.

I'm pretty sure the RD57 doesn't fit the Disco2's, and that is the one for the 4.6 V8 P38 diff and Defender Rover type rears. This is all despite what the ARB catalogue says.

Post by **Slunnie** » Mon Oct 23, 2006 10:03 pm

Gday Reddo,

The Disco2 axle has a flange on it that wont slide into the Disco1/RRC/Def etc axles. The diff end is the same, but the axle end isn't. All of the Disco2's are like this.

Post by **Reddo** » Tue Oct 24, 2006 11:07 am

Many thanks, now I understand. Our axles were not off a D2 but a later model D1!

Post by **red90** » Wed Oct 25, 2006 1:01 am

Yes, the diffs (third members) are interchangable. The halfshaft and hub setup is completely different.

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disco series 1 diff same as a s2.

disco series 1 diff same as a s2.

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