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[Autographix NI]

Can somebody who knows their stuff tell me what i have here is supposed to be LSD but what ratio

[Marks DTM Calib]

Thats the housing part number and does not relate to the internals.

Ratio can be worked out by turning the input shaft and seeing home many revolutions are required to get the output to rotate a single turn.

Only fool proof way to prove if LSD is to remove the rear cover (you could then also count the teeth to determine ratio)

[dazzerM]

I was about to ask this exact question 

Been offered an LSD from a plod car, although I wasn't sure on the outer casing numbers. I thought the LSD numbers were unique on the casing, I even thought there was a thread it previously although obviously not as I can't find it must have dreamt it 

Your know of its an LSD buddy if it locks, it locks then you got yourself an LSD not sure on ratios as long it works.. 

[doz]

I think all plod lsd's were 3.7.

[Mr Gav]

According to the manual the Diff ID plate should look like this.


No1  0=LSD
       1=no LSD

No2  Final drive ratio

Whether these tags are actually on the diff is another matter

[sassanach]

Thats the housing part number and does not relate to the internals.

Ratio can be worked out by turning the input shaft and seeing home many revolutions are required to get the output to rotate a single turn.

Only fool proof way to prove if LSD is to remove the rear cover (you could then also count the teeth to determine ratio)

ditto

[2woody]

you can at least tell if its LSD or not from the outside.

WITH A DRIVESHAFT REMOVED, look into the output hole where the driveshaft pops in, if there is one cross-shaft keeping the planet wheels apart, then its an open diff. If there's a pair of crossed shafts visible, then its LSD.

[Autographix NI]

you can at least tell if its LSD or not from the outside.

WITH A DRIVESHAFT REMOVED, look into the output hole where the driveshaft pops in, if there is one cross-shaft keeping the planet wheels apart, then its an open diff. If there's a pair of crossed shafts visible, then its LSD.

thanks for the advice, it is an LSD, as i checked if it has the crossed shafts visible & it has , got it fitted up but my TD is not fit to lock it up (in the dry anyway), handling is noticeably improved & feels quicker but engine seems to rev higher to achieve less speed than with open type diff & the on board computer lying display reckons im getting about 4 more mpg(32 instead of 28), I think i was expecting too much from an LSD alone , thinking V6 2.6 or 3.0 may as well for the mpg im getting lol any cheap low mileage ones knocking about ...........

[omegra]

Hi all, have a scenario atm relating to lsd/non lsd diff,. was hoping someone on here could clear it up

I have 2 omegas:
One fitted with  standard diff
Other fitted with a diff out of a 3.2

I had thought the 3.2 diff I got was an lsd, but thought not when only one wheel would lock

After researching on here I see that lsds have two pins in the centre of the  slots for the shafts, 
So after removing a shaft I look down the hole to find 1 pin, therefore non lsd,..

My question is:

When I have the rear of both omegas raised off the ground and first gear selected  in both:

One fitted with  standard diff spins only driver side wheel
Other fitted with a diff out of a 3.2 spins both wheels??? 

Why would the 3.2 diff spin both wheels and not like the standard, I had thought this indicates lsd???

Different ratios? Or is the 3.2 diff an lsd and I just cant see the second pin?

Iv found a lad selling a carlton lsd so will go for it if I havent an lsd already..

PS.. love the site 

[05omegav6]

Did you check both diffs? 

[dieseld4]

Is the td chipped? If not get it chipped and get the lsd shimmed, a chipped td is fit to lock a good lsd. All lsds are 3.7 or 3.9 ratio, this will leave a td worse on fuel, a lsd  can be built with the a td gearing , I have done a few of them

[dbdb]

One fitted with  standard diff spins only driver side wheel
Other fitted with a diff out of a 3.2 spins both wheels??? 

What if you put some resistance against a moving wheel (carefully) e.g. hold a block of wood to the tyre?  I would expect that wheel to stop and the other start but if both wheels continue that's limited slip I would think.

[kcl]

Is the td chipped? If not get it chipped and get the lsd shimmed, a chipped td is fit to lock a good lsd. All lsds are 3.7 or 3.9 ratio, this will leave a td worse on fuel, a lsd  can be built with the a td gearing , I have done a few of them

LSD was available to all ratios, on a 2,6 auto as mine 4,22 diff and I for sure have lsd 

[dieseld4]

So the 2.6 is an Mv6? I do believe an lsd was an option for all Mv6s when new? And a 2.6 auto only Mv6 with the 4.22 ratio, so it would be very rare to get an lsd with that ratio, I know I've never seen one and I've alot of omega lsds. And there would be no chance of getting one with diesel gearing 3.45

[terry paget]

I thought that traction control on later Omegas simulated LSDs. Is this not the case?