I'm trying to check if my MK has a LSD. The previous owner seemed certain of it but I'm not so sure. For starters it has push in shafts and drum brakes and though that wouldnt absolutely rule it out this would seen an unusual combination for LSD. I cant find any markings on the diff that would help.

With the wheels off the ground, in gear with the engine running the wheels both turn in the same direction.

Take it out of gear, turn one wheel by hand and the other turns in the opposite direction.

Does this definietly mean it's not a limited slip diff ?

open diff would mean the wheels turn opposite directions, lsd should both turn the same way.
sounds like an open diff to me.

best way to check though is get the diff cover off and have a look

The XR4x4 LSD isn't your conventional LSD. It's more of a friction LSD thingy so it would behave similar to an open diff.

My xr4x4 lsd the wheels turn in the same direction when off the floor. Sounds like an open diff to me also.

[Edited on 6/4/13 by wylliezx9r]

Sierra LSD, leave in gear, jack the wheels up and try and spin the wheels, LSD it will be very hard to move, open diff and the opposite wheels goes in the opposite direction easily.

Sounds like an open diff.

jack one side up put it in first and rev the tits out of your engine and if the wheel on the floor gets grip and pushes you off the jack or axle stand then its a LSD

If the wheel turn opposite directions when you turn one, then it's either an open diff or a Quaife ATB.

Only way to tell is to look inside. Pull out a shaft and an open diff will have a shaft across between the two sets of splines, a Quaife will be clear through to the other side.

Easy way to work this out

Build the revs
Select first gear
Drop the clutch
And see if you leave an 11 or a 1 Dow the road

quote:

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Originally posted by tomgregory2000
Easy way to work this out

Build the revs
Select first gear
Drop the clutch
And see if you leave an 11 or a 1 Dow the road

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quote:

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Originally posted by Xtreme Kermit

quote:

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Originally posted by tomgregory2000
Easy way to work this out

Build the revs
Select first gear
Drop the clutch
And see if you leave an 11 or a 1 Dow the road

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Lol

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Jack one wheel, neutral, turn wheel by hand
LSD should be very difficult
Owleys comments are not correct the Sierra LSD is a viscous coupled diff not plates and can be felt working on a bench

quote:

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Originally posted by adithorp

If the wheel turn opposite directions when you turn one, then it's either an open diff or a Quaife ATB.

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The torsen diff on my friends supra looks to be an open diff when you turn one wheel the other rotates the opposit direction. However apply a load and its a different story, not all LSDs lock the wheels together with no load, as said you need to take the diff cover off or try and lay some 11s

Indeed my Torsen looks like an open in every way until you pull the case plate off

quote:

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Originally posted by mark chandler
Sierra LSD, leave in gear, jack the wheels up and try and spin the wheels, LSD it will be very hard to move, open diff and the opposite wheels goes in the opposite direction easily.

Sounds like an open diff.

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clear.. as mud then.

quote:

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Originally posted by Not Anumber
clear.. as mud then.

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Sustained donuts...the ultimate test.....

Here is mine, Sierra diff with push in shafts and AP Suretrak LSD:

http://www.youtube.com/watch?v=N8l5mXMS__8

Cheers

Ian