Burning out
Burning out
Is burning out a true tell-tale sign way to tell if you have an LSD? Im the 3rd owner of my car and the 2nd owner didnt do anything to it, but im not sure about the first owner. When I burn out I leave two identical strips, but I've been told, that doesnt tell me anything. I've asked Nissan to check and they looked it up with my VIN and all they could tell me was that I have a spoiler and fog lights (duh, like I couldnt figure that out). I've searched past threads but couldn't find any thing helpful.
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Nismo_Freak
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When you jack up your rear end you have to spin the driveshaft to know if you have a LSD. LSDs will spin oppo if you spin one side. They have to engage to become a LSD ... w/o torque they are open diffs. Jack up the car and get in ... then let out the clutch and act like your driving... have a friend look at both wheels.
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C-Kwik
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Too many wrong answers in here. Nissan's VLSD is always engaged. Torque sensitive diffs like Torsen or Quaiffe Diffs require torque since the torque at both wheels cause a set of floating gears inside the diff housing to bind against the housing which produces the limited slip action. The angle of the cuts on the gears control the amount of slip for a given amount of torque difference.
To test for a VLSD, lift the rear end. Lock the driveshaft into place by putting it into gear. Then spin one of the rear wheels. If it spins freely, it's an open diff. If it is difficult to turn, then you have a VLSD. Both the open diff and VLSD will spin the rear wheels in opposite directions when you do this. Only the VLSD will be significantly harder to turn since the viscous coupling does not allow the two axles to rotate in opposite directions easily.
To test for a VLSD, lift the rear end. Lock the driveshaft into place by putting it into gear. Then spin one of the rear wheels. If it spins freely, it's an open diff. If it is difficult to turn, then you have a VLSD. Both the open diff and VLSD will spin the rear wheels in opposite directions when you do this. Only the VLSD will be significantly harder to turn since the viscous coupling does not allow the two axles to rotate in opposite directions easily.
What makes Nissan's VLSD different from others?
Quote »The viscous coupling has two sets of plates inside a sealed housing that is filled with a thick fluid, as shown in below. One set of plates is connected to each output shaft. Under normal conditions, both sets of plates and the viscous fluid spin at the same speed. When one set of wheels tries to spin faster, perhaps because it is slipping, the set of plates corresponding to those wheels spins faster than the other. The viscous fluid, stuck between the plates, tries to catch up with the faster disks, dragging the slower disks along. This transfers more torque to the slower moving wheels -- the wheels that are not slipping.[/quote]
This is from Howstuffworks.com and this is also what I've read in automotive magazines, I was under the impression that the VLSD had to "engage", and wasn't always "on".
Quote »The viscous coupling has two sets of plates inside a sealed housing that is filled with a thick fluid, as shown in below. One set of plates is connected to each output shaft. Under normal conditions, both sets of plates and the viscous fluid spin at the same speed. When one set of wheels tries to spin faster, perhaps because it is slipping, the set of plates corresponding to those wheels spins faster than the other. The viscous fluid, stuck between the plates, tries to catch up with the faster disks, dragging the slower disks along. This transfers more torque to the slower moving wheels -- the wheels that are not slipping.[/quote]
This is from Howstuffworks.com and this is also what I've read in automotive magazines, I was under the impression that the VLSD had to "engage", and wasn't always "on".
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snoopys240
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What the Dr said....Look under the hood at the left side of your fire wall at Nissan plate...The model should have a 17th,18th and 19th digit of your model number...(not vin#) If there is no letter or digit therei.e "---", then you do not have VLSD, also some other letters will tell you either way if you do or don't have it. Refer to FAQ's, and look under VLSD. That'll tell ya
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MaineExport
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APEXi240 wrote:Jack your rear end up. If you spin your wheels and they both go the same way, you have an LSD, if one spins one way, and the other in the opposite way, then you have an open differential.
Do you have ABS brakes? If so then you have an LSD because they came packaged together.
NOT TRUE AT ALL
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MaineExport
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snoopys240 wrote:What the Dr said....Look under the hood at the left side of your fire wall at Nissan plate...The model should have a 17th,18th and 19th digit of your model number...(not vin#) If there is no letter or digit therei.e "---", then you do not have VLSD, also some other letters will tell you either way if you do or don't have it. Refer to FAQ's, and look under VLSD. That'll tell ya
Thank you! I don't know how many times I have copied/pasted the 240sx.org article to this board. I'm sure if someone ACTUALLY searched the forums they would have found it about four times!!!
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MaineExport
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S-14boy wrote:If you would have read I said I think the first owner might have put one in I realize that my car didn't come with it from the factory.
Actually you said, "Im the 3rd owner of my car and the 2nd owner didnt do anything to it, but im not sure about the first owner"
You didn't mention that you knew it didn't come with one from the factory.
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MaineExport
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APEXi240 wrote:What I posted is what I was told when I posted an LSD question...
Sorry, they were wrong... at least partially.
The VLSD and ABS !ONLY! came together as a package on the 1995 240sx SE. Everyother model AND year they could be purchased seperately OR together.
ALSO... the hand test does not always indicate as you stated. You can get a false negative.
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MaineExport
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What makes you think it didn't come with VLSD from the factory? The ABS has NOTHING to do with VLSD. Read all of the replies, there are a couple ways to tell if you have it or not.... and it has been posted already.... instead of telling us to read YOUR post... go read the replies.... it has been explained!!!
Here it is again.... as previously posted by C-kwik:
"To test for a VLSD, lift the rear end. Lock the driveshaft into place by putting it into gear. Then spin one of the rear wheels. If it spins freely, it's an open diff. If it is difficult to turn, then you have a VLSD. Both the open diff and VLSD will spin the rear wheels in opposite directions when you do this. Only the VLSD will be significantly harder to turn since the viscous coupling does not allow the two axles to rotate in opposite directions easily."
Here it is again.... as previously posted by C-kwik:
"To test for a VLSD, lift the rear end. Lock the driveshaft into place by putting it into gear. Then spin one of the rear wheels. If it spins freely, it's an open diff. If it is difficult to turn, then you have a VLSD. Both the open diff and VLSD will spin the rear wheels in opposite directions when you do this. Only the VLSD will be significantly harder to turn since the viscous coupling does not allow the two axles to rotate in opposite directions easily."
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MaineExport
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FrEaK wrote:The abs and vlsd were a package option.... if he had abs one could deduce that he has an lsd...
WRONG!!!!!!!!!!!!!!!!!!
He has a 98 s14.
Seriously, they were only packaged together on the 95 SE. Other than that, they were sold separately or together. PERIOD... this would be an erroneous deduction!!!!!!!!! This is the third time I have said this in one thread.... wow!
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themadscientist
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while everyone debates the packaging of ABS and LSD together have we thought about the wrench? The previous owner may had the wrench option. They came packied in a box with other tools and would have allowed him to pull an LSD out of another car and put it this one.....Two skid marks is the mark of an LSD in my experience. So I think you have one.
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MaineExport
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I think he does too..... but I think it was there from the beginning. Maybe the first owner put one in, maybe the factory did... he asked if he had one, and several people answered with bad info. Yes, the burnout test IS a pretty good way to tell. But some people here with open diff swear that they can leave two strips of rubber on the road......... I've never seen it happen, but who am I to say they're wrong.
I was just trying to correct misinformation..... sorry:rolleyes .
I was just trying to correct misinformation..... sorry:rolleyes .
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MaineExport
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