Are all S13 diffs LSD's?

jonnyjapanese · #1 18-08-2008, 18:04

So what is a quaif A.T.B. Diff then???? !!!

30psi · #2 18-08-2008, 18:07

Thats a helical type diff.

I do know something thanks. If you want advice, then don't say 'we think you know nothing'.

I have an S15 helical diff and S13 LSD so I have a fairly good idea what I'm talking about

jonnyjapanese · #3 18-08-2008, 18:07

So if you can jack up a sierra 2wd cosworth and turn one wheel the other will turn in the opposite direction and they all have LSD's as standard. Whereas if the car is in gear leave one back wheel on the ground jack the other wheel up it will turn but there will be lots of resistance coz it has an LSD

30psi · #4 18-08-2008, 18:11

Sierra's have viscous LSD's like the S13. Unless the LSD is fucked they wouldn't behave like that.

My shitty old Xantia will have a locked wheel if you leave it in gear and only jack one side.

jonnyjapanese · #5 18-08-2008, 18:15

the picture posted by jackiefan shows that the internals look different to mine it has the plates around the outside of the planet gears. The one in the picture shows the planet gears visible, mine can't be seen for the plates??

30psi · #6 18-08-2008, 18:18

He's shown you an S12 diff thats why it looks different.

All you can see from memory of inside is very little as there are only 4 holes of about 1.5" diameter to see inside with

JackieFan · #7 19-08-2008, 09:16

Quote:

Originally Posted by 30psi

He's shown you an S12 diff thats why it looks different.

All you can see from memory of inside is very little as there are only 4 holes of about 1.5" diameter to see inside with

Actually I didn't, that's an S13 open diff.

30psi is right though, if you can turn the two output shafts in opposite directions without breaking a sweat then it's unlikely that you have one of the standard S13 vLSDs. Or if you do, it's not working very well.

The photo you sent me last night doesn't look like either the standard open diff that I've seen or the Standard vLSD.

Try popping the output shafts and comparing them, send me photo if you like and we might be able to better guess what you've ended up with.

The drive shafts should be two different lengths (about 2" difference) unless your car was already retro-fitted with an LSD and then they might measure the same, however 10" seems too short but that's only from memory.

s13eater · #8 19-08-2008, 11:27

as you can see the shaft at the bottom is the shorter passenger side, but when they are in the diff you can't tell the difference.

jonnyjapanese · #9 18-08-2008, 18:22

On the diagram you posted showing the S13 inners into S12 casing you used the drivers side inner cup from the S13 would using the S12 original drive shaft work if the splines were machined to take the circlip and maybe shortened or do you definately have to use a short passenger side S12 drive shaft onto the drivers side, the best bit is both my drive shafts measure 10" so which is the short one????