Someone help to figure out what happened with LSD?

[Korg77]

I have an LSD, don't know its manufactor.
It's used for a little and removed from a car after road accident)

The problem is, can't find the right words, when i drive my supra forward, with speed about 20-40 miles/h i have to turn drivewheel slightly to the left, cause car try turn to the right... When i lift up rear and let the wheels spin with no contact to the ground, i see that left wheel spins a little faster the right.

Someone can tell wtf happened?



http://ff01.photofile.ru/photo/025/0db/1237546/large/1719439261442cfd5d70ba8.jpg
http://ff01.photofile.ru/photo/025/0db/1237546/large/1219468744442cfc7424510.jpg

 

[NashMan]

that is kinda normale to me man cheak your front toe and rear toe

 

[Korg77]

I hope so. Tomorrow i'll swap some parts of suspension and check toe. Realy hope this is only reason, cause i did it only 1500 miles ago.

 

[Nick M]

When i lift up rear and let the wheels spin with no contact to the ground, i see that left wheel spins a little faster the right.

How much faster? A limited slip differential applies unequal torque to the rear wheels. You shouldnt really be able to see it. Perhaps it is starting to slip a bit.

As for the pull, have the front end checked and an alignment done, as already mentioned.

 

[IJ.]

How much faster? A limited slip differential applies unequal torque to the rear wheels. You shouldnt really be able to see it. Perhaps it is starting to slip a bit.

As for the pull, have the front end checked and an alignment done, as already mentioned.

Typo Nick?

 

[Korg77]

How much faster? A limited slip differential applies unequal torque to the rear wheels. You shouldnt really be able to see it.

unfortunally i see this.

If to tell all story: i was new in such devices and after install, when i heard "click-click-click" for the first time, i really get scared (?). Just after week someone told me "guy, you should be lucky, cause you have real LSD and it MUST make such noise when you slow cornering or parking"

So, i just check the oil - it clear, but i remember a test, recommended on cygnusx1.net - to lift one of the rear wheel, rotate it by hands, and after 4-6 times it must get blocked. So, if i check my lsd such way, i notive that it's realy hard to rotate even 1 time.

 

[bigaaron]

unfortunally i see this.

If to tell all story: i was new in such devices and after install, when i heard "click-click-click" for the first time, i really get scared (?). Just after week someone told me "guy, you should be lucky, cause you have real LSD and it MUST make such noise when you slow cornering or parking"

So, i just check the oil - it clear, but i remember a test, recommended on cygnusx1.net - to lift one of the rear wheel, rotate it by hands, and after 4-6 times it must get blocked. So, if i check my lsd such way, i notive that it's realy hard to rotate even 1 time.

If you run straight 80w90 it might make the chatter you are having. Try changing the oil and use a good lsd oil or regular diff oil with friction modifier. I use the Ford stuff, it has worked well in my diffs and I have heard it is better then most.

 

[Korg77]

bigaaron:
Right, i see the difference. Castrol mineral 80w90 ("hipoy LS") much louder than 75w140 Castrol SAF xj, i use right now.

 

[bigaaron]

bigaaron:
Right, i see the difference. Castrol mineral 80w90 ("hipoy LS") much louder than 75w140 Castrol SAF xj, i use right now.

I am not sure if the weight difference would make the noise you are describing though. The noise you are hearing seems to be when the lsd first starts to break loose. The friction modifier makes the oil basically more slippery, which quiets the lsd action, but it has the right properties to also not allow too much slip. You don't want to use too much because it could make the lsd slip too much and then you are almost back to an open diff. I have heard before to use a small amount and see how works, and add a little more only if it chatters.