Clutch burnt smell

[izanagi]

Hi all.
I own a TRD 2 way LSD on my Trueno.
When i'm stopped and start to drive and turning together, i can hear my clutch disk swapping and burnt smelling.
Why ?
Is it because it's a 2 way diff and it blocks already the wheels when the car is moving ?

[driftmaniacae86]

hi i think 2 way isnt drive to road u know its only for race
so when u are in race didnt care u noise but
when are in road u hear everything thats why u hear this noise

what is ur car ?? 2 way diff is nothing to do with clutch
if i am correct

[allencr]

Burnt gear oil smell or friction material/brake type smell?
No, It'd be impossible to smell unless they were dry, the diff housing had a BIG vent and one wheel were was turning much more then the other. The oil would burn first and on a common 90degree turn, there's only 4-6 more turns difference between the inside & outside wheel, so not enough slippage & not enough speed to burn anything.
2 way is fine, it's from the factory exactly that way.

[izanagi]

My clutch is almost new and it smells friction material.
Something like braking the clutch.

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[Ivan141]

Are you sure it's not the brake calipers binding? Much more likely than the clutch burning.

[izanagi]

(08-18-2014 03:28 PM)Ivan141 Wrote:  Are you sure it's not the brake calipers binding? Much more likely than the clutch burning.

I've rebuilt my rear brake calipers.

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[allencr]

Get outta the car & use your nose to locate the source.

[wouter86]

(08-18-2014 03:36 PM)izanagi Wrote:  

(08-18-2014 03:28 PM)Ivan141 Wrote:  Are you sure it's not the brake calipers binding? Much more likely than the clutch burning.

I've rebuilt my rear brake calipers.

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just drive a little bit until you notice the burned smell, GENTLY feel if the rear calipers and disc are hot, if not i would not suspect the rear brake calipers.

[jondee86]

(08-18-2014 09:33 AM)izanagi Wrote:  I own a TRD 2 way LSD on my Trueno. When i'm stopped and start
to drive and turning together, i can hear my clutch disk swapping
and burnt smelling. Why ?
Is it because it's a 2 way diff and it blocks already the wheels when
the car is moving ?

All clutch type LSD's rely on the "wedging" action of the cam and ramps
to create pressure on the clutch packs and lock the axles together more
or less, depending on the load. A 2-way LSD is designed for racing type
applications, and will have more aggressive ramp angles and some pre-load
to ensure that it locks up early and firmly.

This means that when you do a standing start, you can expect the LSD
to lock. If you are making a turn at the same time (out of a parallel park
for example), the locked up diff will try and skid the inside wheel. With
wide rims and sticky tires, this can take quite a lot of effort. So more
slipping of the clutch, and a few more revs are required.

A new clutch plate, like new brake pads, has binder resins that need to
burn off during the bedding in process, before the lining becomes fully
effective. Moving at speed, the smell of the resins burning is swept away,
but moving away from a park, or manouvering in a tight space, the smell
will be noticeable in the car.

It will go away after you have done a few hill starts and high rpm launches
from the traffic lights

Cheers... jondee86

[izanagi]

(09-04-2014 10:54 PM)jondee86 Wrote:  

(08-18-2014 09:33 AM)izanagi Wrote:  I own a TRD 2 way LSD on my Trueno. When i'm stopped and start
to drive and turning together, i can hear my clutch disk swapping
and burnt smelling. Why ?
Is it because it's a 2 way diff and it blocks already the wheels when
the car is moving ?

All clutch type LSD's rely on the "wedging" action of the cam and ramps
to create pressure on the clutch packs and lock the axles together more
or less, depending on the load. A 2-way LSD is designed for racing type
applications, and will have more aggressive ramp angles and some pre-load
to ensure that it locks up early and firmly.

This means that when you do a standing start, you can expect the LSD
to lock. If you are making a turn at the same time (out of a parallel park
for example), the locked up diff will try and skid the inside wheel. With
wide rims and sticky tires, this can take quite a lot of effort. So more
slipping of the clutch, and a few more revs are required.

A new clutch plate, like new brake pads, has binder resins that need to
burn off during the bedding in process, before the lining becomes fully
effective. Moving at speed, the smell of the resins burning is swept away,
but moving away from a park, or manouvering in a tight space, the smell
will be noticeable in the car.

It will go away after you have done a few hill starts and high rpm launches
from the traffic lights

Cheers... jondee86

Thanks for the explanation.
I've understood.
Perfect.