Are All NB Diff carriers/housings the same ?

selaga · Postby **selaga** » Fri Jul 22, 2011 4:27 pm

I broke a diff housing on my 2004 SE, and wanted to know if all NB's have the same housings ?

Also do TORSEN's need special oil/friction modifiers like normal LSD ?

Advice is much appreciated.

Cheers,

Sel

Postby **mx52nv** » Fri Jul 22, 2011 4:49 pm

Hi Sel,
Unfortunately, you must get another SE diff housing if you wish to continue using the large diameter splines of the SE axles. Click here for reference post from MT.net.

In order words, other non-SE housings will not be able to accomodate the axles you have on there.

Hope this helps you.

Les @ MX5 Shop

selaga · Postby **selaga** » Fri Jul 22, 2011 4:58 pm

Thanks Les,

I just bought one from MX5Plus on AJ's advice, looks like I will have a carrier that I cannot use.

It looks like they are cast alloy, has anyone had any luck in getting them welded ?

Cheers,

Sel

selaga · Postby **selaga** » Fri Jul 22, 2011 5:56 pm

It gets interesting.....FSM lists different part #'s for axles, yet one part number for the carrier ?

REAR DRIVE AXLE
1 Shaft Assy, Axle
w/Turbo R/L MA03-25-50X
w/o Turbo R/L MD21-25-500
2 Joint Assy, Outer¶
1999-00
w/ABS R/L MD12-22-510B
w/o ABS R/L MD11-22-510A
2001-03 R/L MD12-22-510B
2004-Serviced w/Axle Shaft Assy
3 Boot Set, Outer¶
1999-03 (a) R/L M090-22-530-9U
2004
w/Turbo R/L MA03-22-530
w/o Turbo R/L M090-22-530-9U
(a) Included w/Outer Joint Assy
4 Joint Assy, Inner¶
w/Turbo R/L MA03-22-520
w/Turbo R/L MD02-22-520B
5 Boot, Inner¶ (b)
w/Turbo R/L MA01-22-540
w/o Turbo R/L M090-22-540-9U
¶Included w/Axle Shaft Assy
(b) Included w/Inner Joint Assy
6 Case, Differential MA02-27-600A

93_Clubman · Postby **93_Clubman** » Fri Jul 22, 2011 6:39 pm

selaga wrote:Also do TORSEN's need special oil/friction modifiers like normal LSD ?

MX5_DriftFury advised me last year to use an LSD compatible oil in the NA TorSen 1, but not in the NB TorSen 2.

geofiz · Postby **geofiz** » Fri Jul 22, 2011 11:56 pm

selaga wrote:Thanks Les,

I just bought one from MX5Plus on AJ's advice, looks like I will have a carrier that I cannot use.

It looks like they are cast alloy, has anyone had any luck in getting them welded ?

Cheers,

Sel

Sel,

I would have to disagree with Les here. I recently installed the SE diff and axles into a standard NB8A diff carrier with no problems.

The SE axles do have a thicker splined section (around 1.4 mm larger OD), but the machined surface that the axle seals run on is the same diameter as the standard axles. The part number for the axle seals for SE and standard NB are also the same.

Long story short, the new carrier you bought will be fine

Any queries, let me know.

Russell

selaga · Postby **selaga** » Sat Jul 23, 2011 12:15 am

geofiz wrote:
selaga wrote:Thanks Les,

I just bought one from MX5Plus on AJ's advice, looks like I will have a carrier that I cannot use.

It looks like they are cast alloy, has anyone had any luck in getting them welded ?

Cheers,

Sel

Sel,

I would have to disagree with Les here. I recently installed the SE diff and axles into a standard NB8A diff carrier with no problems.

The SE axles do have a thicker splined section (around 1.4 mm larger OD), but the machined surface that the axle seals run on is the same diameter as the standard axles. The part number for the axle seals for SE and standard NB are also the same.

Long story short, the new carrier you bought will be fine

Any queries, let me know.

Russell

Russell,

You confirmed what the parts manual/numbers is/are saying. MX5+ only charged me $220 delivered to Sydney, so I got out of it fairly cheeply (new carrier is $2500 ex tax, plus 6 weeks ex Japan), probably another $250 for labor, so not too bad in the end.

Cheers,

Sel

Postby **mx52nv** » Mon Jul 25, 2011 4:13 am

I stand corrrected. :mrgreen:

Hope someone at MT.net is humble enough to correct their information.

Les

selaga · Postby **selaga** » Mon Jul 25, 2011 8:23 am

mx52nv wrote:I stand corrrected.

Hope someone at MT.net is humble enough to correct their information.

Les

Les, no dramas.............I re-read the MT.net spiel and the information is correct, i.e. axles and diff both need to be from SE to work, other combinations will not.No mention of the diff carrier though, however a few members have confirmed now that they are the same.

Cheers,

Sel

flycasta · Postby **flycasta** » Mon Jul 25, 2011 8:27 pm

geofiz wrote:The SE axles do have a thicker splined section (around 1.4 mm larger OD), but the machined surface that the axle seals run on is the same diameter as the standard axles.

Russell

I would be interested to know the diameter and the amount of splines you found in the diff. 1.4mm larger doesn't sound like anything else I have ever come across.

Duane

geofiz · Postby **geofiz** » Mon Jul 25, 2011 11:32 pm

Duane,

Dont quote me on the 1.4 mm being exact, but it was around that amount. Next time I have an axle out, I will measure the OD accurately and count the splines.

Russell

flycasta · Postby **flycasta** » Mon Jul 25, 2011 11:35 pm

Thankyou that would be good.

selaga · Postby **selaga** » Wed Jul 27, 2011 7:37 pm

OK, here is what was found.....

spline count = 28

Halfshaft = d24mm
Outer CV joint hashed area (in between the splines and the seal flange) = d30mm
Outer CV joint spline area = d30mm

Standard 1.8 carrier/housing = SE carrier/housing.
Standard 1.8 axle seals = SE axle seals.

Hope that help you guys out.

Cheers,

Sel

flycasta · Postby **flycasta** » Wed Jul 27, 2011 10:17 pm

So thats 28 spline into the Diff?

Are they LSD standard?

What type of LSD if you know please?

Duane

geofiz · Postby **geofiz** » Wed Jul 27, 2011 11:19 pm

I will measure the set of standard NB8B axles I have in the shed tommorow and post the measurements as a comparison.

The SE comes from the factory with a Torsen 2 LSD, 3.63 ratio.