r31 diff

[surfiemullet]

I was just wondering which r31's came out with the 4.11 diff gears and which ones came with lsd. thanks

[Parag0n]

Im pretty sure of this now.

3.9 is standard for Oz built R31 Skyline with auto trans

3.7 gears were used in R31 Skylines with manual trans

4.1 gears were used in R31 Pintara's

Dont know about lsd

[Parag0n]

If anyone can confirm this it would be good, I remember hearing this but cant be too sure.

[slow_r31]

yeh thats right

the silhouttes and gts I/II's had LSD centres

[rb20-calais]

silhouettes are 4.11 as well.

Evan

[slow_r31]

since when?? im pretty sure its only the pintara's with the 4.11 centre

[Guest outlawskyline]

I think the sillouhettes are 4.11 and LSD

[R31Nismoid]

IMPORT R31's with the R200

ALL LSD if they came out of turbo cars.

4.11 in the manual and i think 4.3 in the auto.

[Deano]

Parag0n is right with the diff ratios of the oz built R31's but LSD's only came out in silhouettes. The normal silhouettes (not the GTS's) came out with 3.9 LSD's with auto trans and 3.7 LSD's with manual trans. GTS1's were all manual and came with 3.7 LSD's while GTS2's came with 3.9 LSD's regardless of whether they are auto or manual.

[rsx84]

i have a r31 which i can get both wheels spinning (linelock) but it doesn't have lsd this i carn't work out, i,ve been told its a common thing with the oz 31s', also does any one know where to get my hands on a r200 diff.

[R31Nismoid]

you cant put the R200 in an Oz skyline.

The Imports are IRS, Oz spec are live Axle.

Some here can say you can 'convert' it but realistically for cost, you'd be far better off buying an import.

The R200 is tough as nails though. I have never heard of one dying and i treat mine very roughly

[Bluprint]

For Australian R31s:

Skyline Auto = 3.889:1

Skyline Manual = 3.70:1

Pintara Auto & Manual = 4.11:1

Silhouette GTS1 Manual Only = 3.70:1

Silhouette GTS2 Auto & Manual = 3.889:1

[SKY031]

Originally posted by Bluprint

For Australian R31s:

Skyline Auto = 3.889:1

Skyline Manual = 3.70:1

Pintara Auto & Manual = 4.11:1

Silhouette GTS1 Manual Only = 3.70:1

Silhouette GTS2 Auto & Manual = 3.889:1

close.....

but one too many 8's

Skyline Auto = 3.89:1

Skyline Manual = 3.70:1

Pintara Auto & Manual = 4.11:1

Silhouette GTS1 Manual Only = 3.70:1

Silhouette GTS2 Auto & Manual = 3.89:1

[rsx84]

the r200 diff i'm looking for is not for the r31

[Zensoku]

close.....  

but one too many 8's  

Skyline Auto = 3.89:1  

Skyline Manual = 3.70:1  

Pintara Auto & Manual = 4.11:1  

Silhouette GTS1 Manual Only = 3.70:1  

Silhouette GTS2 Auto & Manual = 3.89:1

Straight out of my service manual:

Australian Nissan Skyline/Pintara 1986-1990

Manual 3.7:1

Auto 3.889:1

Pintara Auto: 4.1:1 (to help the lazy CA20 motor rev into it's torque range)

This is the Borg Warner BTR78 series 2 pinion (weak!) diff.

This diff was also found in:

XT-EA Ford Falcon

Late VK-VR Commodore

Not sure with the 25 spline LSD's or 28 spline 4 pinion LSD's.

[surfiemullet]

yep the same diff was used in the vl commodore. a similar one is in the vn-vr except its wider. I am looking at fitting a r31 diff on my vn commodore but i was hoping to pic up an lsd one cheap. Or i could just remove the lsd and gears to keep cost down. Has anyone got an lsd one from the wreckers or any prices? thanks for the replys.

[slow_r31]

Originally posted by surfiemullet

yep the same diff was used in the vl commodore. a similar one is in the vn-vr except its wider. I am looking at fitting a r31 diff on my vn commodore but i was hoping to pic up an lsd one cheap. Or i could just remove the lsd and gears to keep cost down. Has anyone got an lsd one from the wreckers or any prices? thanks for the replys.

good luck getting one that doesn't whine like crazy, or isnt stuffed, unfortunatly seems to be pretty common

[slip]

karina - you are wrong! 3.889 in the manual.

[davehoos]

it is 3.889 divide the 2 numbers and it goes on a bit.

if you round that off it 3.89 again thats 3.9 again thats 4.

most use the 3.89 so no to confuse with holden or banjo 3.9.

to use in a holden,count the axle splines first.

they are all different.

r31 skylines use 4 pinion diffs.import and local.

Sohc imports have 4.11 2 pinion diffs suprise so does a pintara.

not all turbos have lsd.its a factory option.

all silo have lsd.

import 4 cy use a banjo diff the same as 5 link laurels.

[SKY031]

Originally posted by slip

karina - you are wrong!  3.889 in the manual.

bah im not going digging for it.....

But i'll tell dave.