Diff fluid change
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Originally Posted by SpitfireS,Aug 26 2008, 06:54 PM
INTJ Posted on Aug 26 2008, 09:46 PM
What if BOTH sides have equal grip & traction but run at different revs?
The Torsen goes:
My point was that after some time the oil may not meet those specs anymore, creating different behavior.
Btw: Honda recommends SAE 90 GL-5
Not 90W or anything else.
And probably because of the final drive.
That's only a 7" ring&pinion set having to deal with a lot of horses in a relative small housing holding under a quart of oil.
What if BOTH sides have equal grip & traction but run at different revs?
The Torsen goes:
My point was that after some time the oil may not meet those specs anymore, creating different behavior.
Btw: Honda recommends SAE 90 GL-5
Not 90W or anything else.
And probably because of the final drive.
That's only a 7" ring&pinion set having to deal with a lot of horses in a relative small housing holding under a quart of oil.
Again, the gearset won't be harmed by the weight of the oil, but it will change the "action" of the gearset.
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INTJ Posted on Aug 27 2008, 05:28 PM
True.
The Torsen uses the rev difference between left&right and the special shape of the gears inside to push the side gears together or apart against the housing.
THAT'S how it works
That's how it creates "lock"
I never said anything about weight, I was talking about the status / health / whateveryouliketocallit of the oil.
If the gear oil can't handle the pressure (anymore because it's EP additives are "worn out") the sideways forces generated by the special gears is different (probably less) and the Torsen will behave very different.
(here it is
It is a gear system not a viscous system
revs are completely irrelevant.
THAT'S how it works
That's how it creates "lock"
Again, the gearset won't be harmed by the weight of the oil, but it will change the "action" of the gearset.
If the gear oil can't handle the pressure (anymore because it's EP additives are "worn out") the sideways forces generated by the special gears is different (probably less) and the Torsen will behave very different.
(here it is
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From: Walnut Park
I bought my S in june and 3 weeks ago did my first oil changed with Redline synthetic, Tranny fluid and differential fluid change. I swear the redline seems like i can feel the engine rev quicker and the tranny feels like butter. This is my first car with a diff, so i dont know what it would feel like with dirty fluid as opposed to new one.
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Originally Posted by SpitfireS,Aug 27 2008, 09:05 AM
INTJ Posted on Aug 27 2008, 05:28 PM
True.
The Torsen uses the rev difference between left&right and the special shape of the gears inside to push the side gears together or apart against the housing.
THAT'S how it works
That's how it creates "lock"
I never said anything about weight, I was talking about the status / health / whateveryouliketocallit of the oil.
If the gear oil can't handle the pressure (anymore because it's EP additives are "worn out") the sideways forces generated by the special gears is different (probably less) and the Torsen will behave very different.
(here it is
True.
The Torsen uses the rev difference between left&right and the special shape of the gears inside to push the side gears together or apart against the housing.
THAT'S how it works
That's how it creates "lock"
I never said anything about weight, I was talking about the status / health / whateveryouliketocallit of the oil.
If the gear oil can't handle the pressure (anymore because it's EP additives are "worn out") the sideways forces generated by the special gears is different (probably less) and the Torsen will behave very different.
(here it is
You are still wrong, the gear load is what sets the action, not rpm. That is why it can free-wheel when one wheel is in the air. Jack one wheel up and see. This is why off-roaders can't/won't use it in the rear. You can see the same on a on a split-mu surface like clean or wet ice.
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From: 17 ft below sea level.
Go to this website:
http://www.torsen.com/general/general_faq.htm
Find the second FAQ question and follow the link to the pdf article.
Chapter 2.1
Here's a quote from that article:
The rest of that article is about the T-1 and mentiones different parts not found in the T-2, the unit used in the S2k.
This pdf is all about the T-2:
http://www.torsen.com/files/Torsen%20T-2%2...cal%20Sheet.pdf
The Torsen only senses the loss of torque going to one wheel by that wheel spinning faster than the other (IOW difference in rotational speed )
It also uses the transfered torque AND the difference in rotational speed to generate sideway forces inside the Toren housing by the EQUVEX gears.
And yes, with one wheel in the air or on a really slippery surface the total tranfered torque is close to nothing, leaving "nothing to work with".
On the other hand, when both wheels DO have equal en enough grip, but there IS difference in rotational speed (tight corner) the Torsen gets
Under those circumstances the oil needs to be able to allow the gears inside the Torsen housing to run at different speeds while they are pushed against the housing and eachother, IOW it needs good EP additives (GL-5) and they need to be in good shape.
http://www.torsen.com/general/general_faq.htm
Find the second FAQ question and follow the link to the pdf article.
Chapter 2.1
Here's a quote from that article:
Power, of course, is the product of torque and rotational speed.
However, since it is possible to express vehicular traction as a reaction force acting at a given wheel radius, traction considerations related to the function of power transfer to the drive axles may be expressed in terms of torque alone.
However, since it is possible to express vehicular traction as a reaction force acting at a given wheel radius, traction considerations related to the function of power transfer to the drive axles may be expressed in terms of torque alone.
This pdf is all about the T-2:
http://www.torsen.com/files/Torsen%20T-2%2...cal%20Sheet.pdf
The Torsen only senses the loss of torque going to one wheel by that wheel spinning faster than the other (IOW difference in rotational speed
)It also uses the transfered torque AND the difference in rotational speed to generate sideway forces inside the Toren housing by the EQUVEX gears.
And yes, with one wheel in the air or on a really slippery surface the total tranfered torque is close to nothing, leaving "nothing to work with".
On the other hand, when both wheels DO have equal en enough grip, but there IS difference in rotational speed (tight corner) the Torsen gets
Under those circumstances the oil needs to be able to allow the gears inside the Torsen housing to run at different speeds while they are pushed against the housing and eachother, IOW it needs good EP additives (GL-5) and they need to be in good shape.
