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Will Adams
TryHard
WA
Soarer GT-TL

Posts: 267
Reg: 02-2006

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Wednesday, April 26, 2006 - 10:56 am, by:  Will Adams (Draco) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I looked under the bonnet and discovered my Trans/Axle says A02B. Tell me I'm not dreaming. Is this definately LSD? Any other way I can check by looking at the diff?
Peter Nitschke
JunkFilterer
South Australia
GT4.0 V8

Posts: 4397
Reg: 11-2004

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Wednesday, April 26, 2006 - 11:00 am, by:  Peter Nitschke (Pen) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Test it, one wheel on eg grass, the other on bitumen. Put your foot down and see if the wheel on the slippery surface spins by itself.

Please, make sure you only try this in a very safe place with no other traffic around.
Will Adams
TryHard
WA
Soarer GT-TL

Posts: 274
Reg: 02-2006

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Wednesday, April 26, 2006 - 11:38 am, by:  Will Adams (Draco) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Peter how do I do this while I'm in the car? Is there a safer method?
Peter Nitschke
JunkFilterer
South Australia
GT4.0 V8

Posts: 4399
Reg: 11-2004

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Wednesday, April 26, 2006 - 11:43 am, by:  Peter Nitschke (Pen) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Will, if just the one wheel spins, you should hear and feel it as the engine revs out higher without the car moving much. If both wheels spin, the back will probably start to slide to the left due to the camber of the road and you should hear and see the right hand rear as it squeals and smokes on the bitumen.

You only need to do it for a second or so, no need to sit there blasting away once you know what is happening. Also, if you then park and go back to have a look, you should easily be able to see if the drivers wheel left any marks or not.

There are other methods that require jacking the car up and having two people at the rear wheels, been documented elsewhere but I don't recall the procedure.

A 2 second wheely is the quickest way :-)
Will Adams
TryHard
WA
Soarer GT-TL

Posts: 275
Reg: 02-2006

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Wednesday, April 26, 2006 - 11:48 am, by:  Will Adams (Draco) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

So Peter if the left wheel spins and the car doesn't move much what does this mean?

If the right wheel squeals and smokes what does this mean?

If the driver's wheel leaves a mark, what does this mean?

Sorry for my ignorance.
Peter Nitschke
JunkFilterer
South Australia
GT4.0 V8

Posts: 4401
Reg: 11-2004

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Wednesday, April 26, 2006 - 12:13 pm, by:  Peter Nitschke (Pen) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

1. Not an LSD as it allows one wheel to spin without transferring power to the wheel with grip.

2. It is an LSD as it is transferring power to the wheel with grip.

3. Visual confirmation of 2.

:-)
Will Adams
TryHard
WA
Soarer GT-TL

Posts: 276
Reg: 02-2006

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Wednesday, April 26, 2006 - 12:15 pm, by:  Will Adams (Draco) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Thanks got it now. Will confirm this later today. Fingers crossed
Peter Nitschke
JunkFilterer
South Australia
GT4.0 V8

Posts: 4402
Reg: 11-2004

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Wednesday, April 26, 2006 - 12:17 pm, by:  Peter Nitschke (Pen) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

You might actually enjoy it :-)
Will Adams
TryHard
WA
Soarer GT-TL

Posts: 277
Reg: 02-2006

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Wednesday, April 26, 2006 - 12:28 pm, by:  Will Adams (Draco) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

My fuel economy is going to be so bad this week, that with the BFI mod and intercooler clean
Tim Eacott
Goo Roo
ACT/Canberra
JZZ30 Factory Manual Lux Pack

Posts: 1215
Reg: 07-2005

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Wednesday, April 26, 2006 - 01:52 pm, by:  Tim Eacott (Timme) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Will just do a burnout!
if you get 2 black lines you have a lsd...
Peter Nitschke
JunkFilterer
South Australia
GT4.0 V8

Posts: 4406
Reg: 11-2004

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Wednesday, April 26, 2006 - 02:06 pm, by:  Peter Nitschke (Pen) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Wrong. On a normal road with roughly equal traction at the back wheels a non LSD can spin both wheels. The whole idea of an LSD is to make a difference when you have significantly different traction levels between the two rear wheels.
Will Adams
TryHard
WA
Soarer GT-TL

Posts: 281
Reg: 02-2006

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Wednesday, April 26, 2006 - 02:27 pm, by:  Will Adams (Draco) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Okay, here was the test I conducted.

Managed to find a hole with a puddle in it. Wasn't a big hole, it dips a little and that's about it.

Put left wheel in the hole with water, held onto brake and accelerated. Car started spinning right wheel and pulling to that side.

Put right wheel in the hole with water, held onto brake and accelerated. Car started spinning left wheel and pulling to that side.

Came out of the whole, held onto brake and accelerated both wheels spun and left black marks on a driveway with no smooth surface (lots of leaves).

Your analysis?
Peter Nitschke
JunkFilterer
South Australia
GT4.0 V8

Posts: 4407
Reg: 11-2004

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Wednesday, April 26, 2006 - 02:43 pm, by:  Peter Nitschke (Pen) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

If only one wheel span and not both wheels, that sounds very much like a normal diff. Interesting that the wet wheel didn't spin though, or was it just not smoking?

The concept is, that if one wheel loses traction, the LSD then transfers power away from that wheel, to the other wheel (which has traction) to get the car moving.

A normal open diff just lets which ever wheel has less traction spin as much as it likes, with the result the car doesn't get pushed forward properly.

The only advantage of an open diff, is that with only one wheel spinning, you still have 3 wheels with traction and thus less chance of the back sliding out badly as it does with both wheels spinning.
Will Adams
TryHard
WA
Soarer GT-TL

Posts: 282
Reg: 02-2006

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Wednesday, April 26, 2006 - 02:53 pm, by:  Will Adams (Draco) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Peter, I did it properly this time.

Drove the car to the same puddle (opposite the house you see).

Put right wheel in puddle and accelerated with the brake on again.

Stuck my head out of the window, and found the right wheel was spinning. I then also adjusted the mirrors to see my left wheel. Dug in and did a burnout and both wheels were spinning (tyre smoke from both sides of the tyres).
Peter Nitschke
JunkFilterer
South Australia
GT4.0 V8

Posts: 4410
Reg: 11-2004

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Wednesday, April 26, 2006 - 03:05 pm, by:  Peter Nitschke (Pen) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

OK, that is sounding more like you have a winner then :-)

Which also explains why the carr pulled sideways in your first test. An open diff is more inclined to just sit there as 3 wheels are holding the car in place.
Will Adams
TryHard
WA
Soarer GT-TL

Posts: 284
Reg: 02-2006

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Wednesday, April 26, 2006 - 03:08 pm, by:  Will Adams (Draco) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Excuse me for a second.....................



Thanks for the help there Peter. Praise the guy/gal that ticked this option on my car.
James Harris
DieHard
QLD
TT

Posts: 572
Reg: 07-2005

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Wednesday, April 26, 2006 - 03:54 pm, by:  James Harris (Haro) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

hahah...

that was a difficult read !

but congrats on findin a LSD... lucky bugger
Jeff Smith
TryHard
NSW
TT Limited :-) equiped toyota torsen diff

Posts: 233
Reg: 07-2005

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Wednesday, April 26, 2006 - 04:49 pm, by:  Jeff Smith (Mozzie) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Yep
I also found out on the easter bash that i have toyota LSD(A02B and stoked about it) but i wasn't shaw but it did feel like it when you kick it sideways it just drifted.But the old hilux days(normal diff).If you kicked it sideways i got just single(sometimes duel)tyre smoke\line no drift just burnout.

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