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Main : Misc : Forum My R31 LSD Conversion

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My R31 LSD Conversion
My R31 LSD ConversionPopular
SubmittersssuteMore Photos from sssute   Last Update2006/11/1 12:23    Tell a friendTell a friend
Hits3655  Comments19    0.00 (0 votes)0.00 (0 votes)
I added X-drilled disks

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The comments are owned by the poster. We aren't responsible for their content.

Poster Thread
dat51k
Posted: 2006/11/2 8:22  Updated: 2006/11/2 8:22
Home away from home
Joined: 2005/8/14
From: sydney,Australia
Posts: 638
 Re: My R31 LSD Conversion
would love this diff in my ute.
you will have to post up some pics when it is installed in the mighty datto

Poster Thread
datgo
Posted: 2006/11/2 8:55  Updated: 2006/11/2 8:55
Not too shy to talk
Joined: 2006/9/7
From: murwillumbah nsw
Posts: 32
 Re: My R31 LSD Conversion
be warned ! vl commodore turbo and skyline lsd are different to vn commodore lsd in that the offset where the crown wheel bolts on varies this kinda means you are stuck with a tall ratio if u use the vn type hemisphere (3.08) where as the vl turbs(3.45) ans skyline(3.69) are better suited,

Poster Thread
PIGDOG
Posted: 2006/11/2 9:25  Updated: 2006/11/2 9:25
No life (a.k.a. DattoMaster)
Joined: 2004/10/28
From: Geelong, Vic
Posts: 6184
 Re: My R31 LSD Conversion
interesting, so why did someone with a commodore buy the gears from my skyline diff?

yes IRS commodore and falcon diff centres fit, and i can probably get a 28 spline LSD for $100, buts its for me

Poster Thread
datgo
Posted: 2006/11/2 9:28  Updated: 2006/11/2 9:28
Not too shy to talk
Joined: 2006/9/7
From: murwillumbah nsw
Posts: 32
 Re: My R31 LSD Conversion
perhaps he didn't know, and is going to find out the hard way like i have!

Poster Thread
dattodude
Posted: 2006/11/2 11:43  Updated: 2006/11/2 11:43
No life (a.k.a. DattoMaster)
Joined: 1998/12/6
From: Sydney, Australia
Posts: 5806
 Re: My R31 LSD Conversion
VL Turbo is 3.9. LSD 28 spline.
VL 6 cylinder is 3.45 non-LSD 25 spline.

Both VL Turbo and Skyline Sillouette Diffs are the best choices for Datsun conversion diffs.

Poster Thread
PIGDOG
Posted: 2006/11/2 11:48  Updated: 2006/11/2 11:48
No life (a.k.a. DattoMaster)
Joined: 2004/10/28
From: Geelong, Vic
Posts: 6184
 Re: My R31 LSD Conversion
talking to my commodore friend

the gears work for commodore people, as they are all the same offest apperantly
just we cant use the centres out of commodores
so it must be the housing is different offset too

Poster Thread
dazzasute
Posted: 2006/11/2 13:13  Updated: 2006/11/2 13:13
No life (a.k.a. DattoMaster)
Joined: 2004/3/15
From: Perth Western Australia
Posts: 1018
 Re: My R31 LSD Conversion
mate of mine had the same problem with his r31. he bought a comodore lsd, but apparently you can make it fit if you get some shims made.

Poster Thread
PIGDOG
Posted: 2006/11/3 0:01  Updated: 2006/11/3 0:01
No life (a.k.a. DattoMaster)
Joined: 2004/10/28
From: Geelong, Vic
Posts: 6184
 Re: My R31 LSD Conversion
talked to commodore mate

he is running a vn LSD centre in a VL diff with VL gears, 3.45

all centres for VL V8 and VL turbo till VS(including IRS) are the same diff centre
all gears area also interchangable from R31/VL so VS commodore

so unless its only the skylne diff thats different i dont see why it wont work
even if it is only a matter of shimming the centre, which any diff shop should be able to do

Poster Thread
WhiteSedan
Posted: 2006/11/1 12:43  Updated: 2006/11/1 12:43
No life (a.k.a. DattoMaster)
Joined: 2004/7/15
From: Adelaide, Australia
Posts: 3931
 Re: My R31 LSD Conversion
Nice setup there mate, did you do all the work yourself?

Poster Thread
BAD310
Posted: 2006/11/1 12:50  Updated: 2006/11/1 12:50
Home away from home
Joined: 2005/11/15
From: Gold Coast Australia
Posts: 752
 Re: My R31 LSD Conversion
I'm jealous
What did you get the LSD centre from, a EA/EB falcon or Skyline?

Poster Thread
2QK4U
Posted: 2006/11/1 21:33  Updated: 2006/11/1 21:33
Home away from home
Joined: 2005/4/19
From: Gold Coast, Australia
Posts: 744
 Re: My R31 LSD Conversion
the R31 silhouhette (spelling) had the LSD standard i think. and the stud pattern is still 114.3 same as datsun, rather than the 5 stud commodore/falcon diffs

Poster Thread
2QK4U
Posted: 2006/11/1 21:34  Updated: 2006/11/1 21:34
Home away from home
Joined: 2005/4/19
From: Gold Coast, Australia
Posts: 744
 Re: My R31 LSD Conversion
And the diff looks very nice good work mate!!

Poster Thread
PIGDOG
Posted: 2006/11/2 3:56  Updated: 2006/11/2 3:56
No life (a.k.a. DattoMaster)
Joined: 2004/10/28
From: Geelong, Vic
Posts: 6184
 Re: My R31 LSD Conversion
centres are the same though

its easier to find a smashed falcon or commo than it is to find a skyline lsd

is it true you only have to shorten one axel, if so i might just have to shorten my r31 diff

Poster Thread
LAGWAGON
Posted: 2006/11/2 4:10  Updated: 2006/11/2 4:10
No life (a.k.a. DattoMaster)
Joined: 2004/4/15
From: Melbourne Vic
Posts: 1664
 Re: My R31 LSD Conversion
centres are different from what i've heard. different number of splines needed to go into a falcon one... daveman has tried this before

Poster Thread
Tyrie
Posted: 2006/11/2 4:19  Updated: 2006/11/2 4:19
No life (a.k.a. DattoMaster)
Joined: 2004/5/4
From: Canberra
Posts: 4200
 Re: My R31 LSD Conversion
I think:
r31 28spline
commo/falcon 25spline
falco/commo v8 28spline

so why did skylines have 28spline when 25 was enough for the heavier, more powerful holden/ford sixes?

Poster Thread
Cable_Tie
Posted: 2006/11/2 4:29  Updated: 2006/11/2 4:29
Home away from home
Joined: 2004/6/4
From: Brisbane, Australia
Posts: 770
 Re: My R31 LSD Conversion
Re: Spline count

Falcons ran 25spline up until EB series 2 then went 28.

Commos seem to only be 28 in the V8's + VL turbo.

Yes, I am looking for a 28spline LSD. If you see one for $100 or less, let me know.

There are 2 different length axles in the diff.
Shorten the housing, swap the short to the previous long side and cut/re-spline the long one for the new short side. (I just confused myself)

Saves mod'ing 1 axle. Of course doesn't work in all setups.

Open to other sources of 28spline LSD centres.

Do the IRS commo's run a borgW centre?

Poster Thread
phat_dat1200
Posted: 2006/11/2 5:16  Updated: 2006/11/2 5:16
Home away from home
Joined: 2006/7/22
From: north brissy
Posts: 257
 Re: My R31 LSD Conversion
tell me how you hooked the handbrake up if its going in ya ute

Poster Thread
carjunkie
Posted: 2006/11/2 5:29  Updated: 2006/11/2 5:29
Home away from home
Joined: 2006/5/11
From: brisbane, qld
Posts: 487
 Re: My R31 LSD Conversion
For 28 spline centres try Vn onwards they are all 28. So too are you xr8 and xr6 type axels and later ford centres.
Pretty sure independant have same centre.
Dont think all skyline diffs were 28 spline, only silhouette and the later model version as the BTR78 diff was only produced from 87/88.

Poster Thread
short-coupe
Posted: 2006/11/2 8:13  Updated: 2006/11/2 8:13
Home away from home
Joined: 2006/5/30
From: Brisbane
Posts: 810
 Re: My R31 LSD Conversion
R31 had 28 splines, VN V8 had 28 splines, pintara 25 splines (but you can use the crown and pinion)
stocko R31 open, silhouette & VN V8 had 4 pinion LSD, i had to put my calipers on the front side, it's alot easier with the handbrake cables, on a 1200, handbrake cables go backwards which make life easier

Poster Thread
picko
Posted: 2006/11/2 8:20  Updated: 2006/11/2 8:20
Home away from home
Joined: 2006/8/13
From: perf
Posts: 382
 Re: My R31 LSD Conversion
is that torsen or clutch style lsd??