carnut
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| posted on 27/12/05 at 02:38 PM |
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Sierra LSD Probs
Ive been having probs with my car lurching left under hard accel. Also when doing a burn out, both wheels spin up then the drivers side slows down
and stops while the other just keeps smoking.
Just pulled my sierra lsd apart and cant see any problems with it. I also couldnt see what, if anything puts preload on the plates. Does it just
rely on the viscosity of the grease its packed with?
Theres a seal and steel disk under the plates. Is the steel disk just for keeping the plates off the seal and does it come out out?
cheers
Carnut
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froggy
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| posted on 27/12/05 at 02:49 PM |
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i think that the whole thing relies on the fluid to thicken as more torque is applied to it. it sounds like youve cooked it good and proper.
these viscous couplings must have a lifespan and youve obviously found it
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carnut
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| posted on 27/12/05 at 03:00 PM |
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They dont seen to have been over heated as there's no sign or heat tarnishing or blueing. I just wonder if it just doesnt have the bite in the
plates to stand up to the power.
Can you buy the grease to refit together?
How does the fluid thicken whn more torque is applied? I would have thought that when it slips, friction would heat the grease and make it
thinner.
Carnut
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Wadders
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| posted on 27/12/05 at 03:13 PM |
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From what i understand, the fluid is heated by the friction of the plates spinning, the hotter it gets the more viscous the fluid becomes until it
reaches a point where it can stick the plates together. i think its a specialist job to re-pack them, could be wrong but the weight/power of the car
also determines how effectively they work. Ditched mine and put a quaife ATB in, although not had chance to compare them yet.
Originally posted by froggy
i think that the whole thing relies on the fluid to thicken as more torque is applied to it. it sounds like youve cooked it good and proper.
these viscous couplings must have a lifespan and youve obviously found it
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carnut
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| posted on 27/12/05 at 05:26 PM |
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I cant see why its a specialist job as its all quite simple, a bit like a motorbike clutch but without the springs.
Does anyone know where I should get the grease from?
cheers
Carnut
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NS Dev
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| posted on 27/12/05 at 05:32 PM |
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FF developments supply the grease but according to the ford motorsport official sierra works book, even Boreham never touched them, they sent them
back to FFD in Coventry who repacked them.
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Wadders
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| posted on 27/12/05 at 06:05 PM |
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Thats what i was told by a transmission /diff rebuilder when i enquired. IIRC he also said they could be adjusted to work at different percentages i.e
to suit a lighter car, but i dont have a clue how you do it. maybe one of the ford forums can help?
Originally posted by NS Dev
FF developments supply the grease but according to the ford motorsport official sierra works book, even Boreham never touched them, they sent them
back to FFD in Coventry who repacked them.
quot
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carnut
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| posted on 27/12/05 at 06:19 PM |
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Are the plates supposed to be wavy?
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