Not Anumber
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| posted on 6/4/13 at 03:52 PM |
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is it really an lsd ?
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 ?
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blakep82
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| posted on 6/4/13 at 03:58 PM |
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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
________________________
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don't write OT on a new thread title, you're creating the topic, everything you write is very much ON topic!
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owelly
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| posted on 6/4/13 at 04:01 PM |
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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.
http://www.ppcmag.co.uk
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wylliezx9r
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| posted on 6/4/13 at 04:35 PM |
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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]
I spent a lot of money on booze, birds and fast cars. The rest I just squandered.
George Best
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mark chandler
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| posted on 6/4/13 at 04:38 PM |
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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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Dooey99
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| posted on 6/4/13 at 04:45 PM |
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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 
Less weight more speed, more power more speed
If in doubt, give it a clout
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adithorp
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| posted on 6/4/13 at 06:58 PM |
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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.
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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tomgregory2000
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| posted on 6/4/13 at 07:42 PM |
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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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Xtreme Kermit
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| posted on 6/4/13 at 07:49 PM |
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quote:
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
Lol
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Oddified
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| posted on 6/4/13 at 08:10 PM |
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quote:
Originally posted by Xtreme Kermit
quote:
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
Lol
Brilliant lmao
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snapper
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| posted on 7/4/13 at 07:29 AM |
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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
I eat to survive
I drink to forget
I breath to pi55 my ex wife off (and now my ex partner)
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Paul Turner
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| posted on 7/4/13 at 07:50 AM |
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quote:
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.
Wrong.
That applies only to an open diff.
Over the years I have had 2 x Quaiffe, 1 x Salisbury and 1 x ZF LSD's in my cars. I can 100% guarantee that with a Quaiffe fitted both wheels
turn in the same direction when its jacked off the floor just like it does with a Salisbury or ZF slipper.
I was in the garage yesterday working on the rear of my car fitted witha a Quaiffe and it was plain to see both wheels turning in the same direction.
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Dan.
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| posted on 7/4/13 at 10:53 AM |
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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 
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coyoteboy
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| posted on 7/4/13 at 11:05 AM |
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Indeed my Torsen looks like an open in every way until you pull the case plate off
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mookaloid
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| posted on 7/4/13 at 12:20 PM |
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quote:
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.
this is the correct answer for a sierra LSD.
"That thing you're thinking - it wont be that."
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Not Anumber
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| posted on 7/4/13 at 04:54 PM |
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clear.. as mud then.
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mookaloid
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| posted on 7/4/13 at 05:11 PM |
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quote:
Originally posted by Not Anumber
clear.. as mud then.
as above - leave in gear, jack the rear wheels up and try and spin the wheels, if it is a LSD it will be very hard to turn the wheels. If it is an
open diff then the wheels will turn easily.
In either case if you do this the wheels will turn in opposite directions (that is the way diffs work)
Simples
"That thing you're thinking - it wont be that."
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mackei23b
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| posted on 7/4/13 at 06:22 PM |
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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
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