I have a 96 Jap spec ITR motor, today i was looking at the tranny and i notice that there is no LSD stamp on the tranny. To my knowledge i thought that all itr trannys have LSD stamped on it. The tranny does have a barcode on it and it begines with S80-xxxxxx bunch of numbers follow.. could u guys tell me why my tranny doesnt have LSD stamped on it? is it cuz its a 96 spec? or did it just rubb off? how can i check to make sure that my tranny is lsd equiped. thanks

 

put your car into first gear and jack your car up and rotate one of the the front tire~ and if the other one moves the opposite way then you are OK

good luck

 

my jdm is the same way, no stamp, and the s80 doesn't mean crap, best way to tell at least if there is an lsd in it is to pull the axles and look through the hole, if you see a bar going across, you got screwed, no bar you have lsd, have fun with the 4.7 fd

 

the word "LSD" may have just rubbed off. jack up the car,. leave the car in neutral and spin one of the wheels and if the other side spins, then you have LSD.


[Modified by EkREV, 5:22 AM 10/9/2002]


[Modified by EkREV, 5:49 AM 10/9/2002]

 

Rather than taking the car apart, if you do a hard launch on dry pavement, the front tires should chatter/skip as both wheels spin. Otherwise, one wheel will freespin.

 

what??? does this really happen? i thought the wheels wont move (manually) when in gear...


[Modified by d8168055, 11:12 PM 10/8/2002]

 

Yep. I just noticed that today

 

i tried to jack the car up and spin one tire while the car is in gear.. but it wont let me spin it freely.. but i manage to move one of the wheel left and right a little bit and the other side was also moving and shaking a little bit.. am i good?

 

left and right??? bah~ all cars will move one of the wheel left and right a little bit and the other side was also moving and shaking a little bit

i am not sure~ cuz i just heard about them but never tired it myself

 

any other way of checking?

 

That's the way. While the car is jacked up put it in first gear and manually turn one of the wheels. The other wheel should turn the opposite way. I did it today it works. It even says to do that in the Helms manual to verify the Type R's LSD is operating properly.

 

does it really turn freely while its in 1st gear? i tried and seem to have difficulties turning it..

 

I think the manual says to do that because it verifies that the gears inside are meshing and working properly. I haven't tried it with my Civic which has an open differential, but I have seen other cars with an open differential spin the wheels in opposite directions. If you look at the gears, that is how an open diff works.

Better to first check the gear ratios by noting what speeds redline is in each gear (or any set rpm) and comparing to known Type R speeds. Then you know if you have the right ratios. Then take the axles out and look inside to verify. If you can see all the way through, then it is an LSD. An open diff blocks the hole so you can't see through. I might have that backwards so someone verify that.

 

Yah.. that's nice that we know how to test it and all..

but has there ever been an ITR without an LSD? I wouldn't think so..

maybe it's optional for some years in japan..

EDIT: Mine doesn't say it either..


[Modified by Nameless, 10:21 PM 10/8/2002]

 

well, if the car is in gear and the motor is off, if you move the wheel forward you are turning the axle, which is spinning gears in the tranny, which is turning the flywheel, which is spinning the crank and therefore pistons/rods, cams, etc... Yeah, without combustion the motor won't be terribly easy to just spin, but with some force you can do it, and you'll see if you have an LSD that your other wheel spins as well hence the "limited slip" part of the LSD acronym...

 

I don't think it was very hard to turn. It didn't take much effort.

Helms manual operational check for LSD

1. Set parking brake and block rear wheels
2. Raise front of vehicle
3. With the engine off, shift the transmission into 1st gear
4. Rotate either front wheel by hand and check that the other wheel rotates in the opposite direction
5. If the opposite front wheel does not rotate, or if you cannot spin the front wheels at all, the limited slip differential is faulty and should be replaced

 

ahh ****.. i cant spin my front wheels.. either that or its really hard to turn.. can someone else tell me if they can spin the front wheels freely!?

 

just go into a turn and stamp the gas. then you'll see

 

From the pick you posted it looks like it used to have the LSD writing on it but rubbed off.

It shouldn't be that hard to spin the wheel with the car in 1st when the front is jacked up.

 

same with mine.. but not as rubbed off

 

The problem here is: with a normal diff it will do the same. The other wheel will rotate in the opposite direction too!!!!!

 

Jack the car and secure it with jack stands.
Have a friend hold one wheel while you try to spin the other wheel.
If the wheel spins freely with no resistance you do NOT have LSD.
If the opposite wheel tries to spend or if there is lots of resistance you have LSD.

 

I assume you'll have to do that in neutral??? Or your friend will start to complain.......

 

bwahahaha.... put the car in neutral!

 

You are not spinning the whole engine when you spin one wheel. The rotation you are giving one wheel is transfert directly to the other wheel through the gearing in the LSD. If you cannot spin the wheel manually it probably means that the gears in the LSD are damaged.