LSD tranny?

[Abs]

Hi,

Is there any way to tell if your car has an LSD tranny? Thers a sticker inside the car, where my door closes, and its got alot of jap writing (since its an import) and its got stuff in brackest like (LSD) and (4WD). now i kno its not a 4wd since its a 1991 civic vti (EG4). i kno i could always do a small burn out to find out but first iwanna kno if i can find out without having to resort to it lol.

thanx

[XB-16-AX]

the best and accurate way to tell is remove the gearbox and look inside where the driveshafts & input shaft goes into, and if you can see through it witout anything blocking, or a "pin" then you have LSD, but if you see a "PIN" in the middle then its not LSD.

[shadou]

can't you jack the car and spin one of the driving wheels and if the other one spins in the same direction means it's LSD? heard this somewhere but can't test cos my car doesn't have it :p

[DLO01]

the best and accurate way to tell is remove the gearbox and look inside where the driveshafts & input shaft goes into, and if you can see through it witout anything blocking, or a "pin" then you have LSD, but if you see a "PIN" in the middle then its not LSD.

Correct!

No need to remove gear box. Best way is to remove driveshafts and look inside.

Also (not completly sure about your model) you will have LSD in black letters stamped on your gearbox that you can view with the hood open.


can't you jack the car and spin one of the driving wheels and if the other one spins in the same direction means it's LSD? heard this somewhere but can't test cos my car doesn't have it :p

Incorrect. Test does not work, in gear or not. Period.

This test works on RWD cars but not on our FWD cars.

Please see this thread. :thumbsup:
http://www.ozhonda.com/forum/showthread.php?t=53624

[shadou]

ohhh thanks for clearing that up for me, rep to you kind sir :D

[EG5[KRT]]

can't you jack the car and spin one of the driving wheels and if the other one spins in the same direction means it's LSD? heard this somewhere but can't test cos my car doesn't have it :p

this works.. ive tried it

[shadou]

Omg ..........

[DLO01]

;1153911']this works.. ive tried it

Well then I don't have a LSD and I know I do.

[string]

This test works on RWD cars but not on our FWD cars.

A RWD differential works no differently to a FWD version. If it works for RWD it works for FWD. RWD's might be more commonly equiped with LSD type X which the test works for, but this is not to say that the same type of differential cannot be equiped to a FWD gearbox.

Maybe the test only works on some types of LSD. What types do people in this thread run and does the test work or not for you, maybe we can come up with a list.

[XB-16-AX]

another way of identifying if your gearbox has LSD is if it has the marking as:

YS1 / Y1 w/LSD / Y80 & S80 w/LSD = LSD

see below for full specs:

B-series Tranny Specs

http://i78.photobucket.com/albums/j110/z00mxracing/Tech%20DOCS%20and%20PICS/Bseriesgboxspecs.jpg

[aimre]

The spining whell test will only work with a clutch type LSD or a spool (locked diff)

It WONT work with Helical (what hondas are) and Viscous ones.

S13 and S14 had Viscous ones and are RWD so that test wouldnt have workes. And S15;s have Helical so agaion that test wouldnt have worked

[DLO01]

A RWD differential works no differently to a FWD version. If it works for RWD it works for FWD. RWD's might be more commonly equiped with LSD type X which the test works for, but this is not to say that the same type of differential cannot be equiped to a FWD gearbox.

Maybe the test only works on some types of LSD. What types do people in this thread run and does the test work or not for you, maybe we can come up with a list.

FWD design is different to RWD design.

As I understand they oppererate differently to each other.

The spinning the wheel test works on RWD, but not on FWD lsd's.

While I have no experience in this. I did make some phone calls to Differential Workshops when I had issues with my LSD and thats what they told me.

[EG5[KRT]]

dunno wat mine is.. but its off a jdm eg vti...

must b a diff type of lsd.. mayb they changed the new hondas to a diff type ? i dunno but the test works on mi ne.. coz i had it in the air at work on a hoist and put in drive and both wheels were turning.

[DLO01]

Yeh, don't know man.

So many types, so many designs and makes.

If you can't feel the difference on the road,

The sure way is to remove your driveshafts and see. :thumbsup:

[string]

FWD design is different to RWD design.

As I understand they oppererate differently to each other.

How? They are the same thing. They both do the same job I seriously don't understand your argument here.

[DLO01]

String, like I said, I do not know, I don't know how differently they work. From my understanding and research they opperate differently to each other. The test on a RWD car does not work on a FWD car. :thumbsup:

[creativepunka]

How? They are the same thing. They both do the same job I seriously don't understand your argument here.

I agree. In theory they should both spin the same way. (cant say iv ever tried on a fwd tho). They both run a pinnion and crown wheel and an lsd centre??

[DLO01]

The spining whell test will only work with a clutch type LSD or a spool (locked diff)

It WONT work with Helical (what hondas are) and Viscous ones.

S13 and S14 had Viscous ones and are RWD so that test wouldnt have workes. And S15;s have Helical so agaion that test wouldnt have worked

This man knows his stuff and points to you Sir.

I just made a few phone calls.

There are different types of LSD's and they work differently to each other. Yes they all have the same outcome and to their own degree.

As Aimre said and rightly so:

The spinning test will work with a Clutch Type LSD's. Spin the wheel and the other wheel will spin the same direction.

The spinning test will NOT work with a stock honda Helical Type LSD's. Spin the wheel and the other will not move.

They are different design therefore work/opperate their own way. :thumbsup:

Sorry string. At least we have a proper answer now.

[aimre]

FWD design is different to RWD design.

As I understand they oppererate differently to each other.

The spinning the wheel test works on RWD, but not on FWD lsd's.

While I have no experience in this. I did make some phone calls to Differential Workshops when I had issues with my LSD and thats what they told me.

It depends on the LSD used, not on drive type. It just so happends that FWD usually use the type that wont pass the "Spin a wheel test." Ie Integra with the helical LSD and pulsars with a Viscous one.

BUT, the Nismo LSD ppl put in their pulsars are a Clutch type (from what ive gathers on pulsar.rog) thus that WOULD pass the spin wheel test

[DLO01]

Yes, I agree and understand that now. Thanks for you input. :thumbsup:

[string]

Glad we agree that RWD and FWD diffs work the same way. They both allow the inside and outside wheels to spin at different rates. How they do that is entirely and 100% independant of the drive train type as you can get pretty much all types of LSDs for both.

All in all, spin test sucks. Take your axels out and check it out the right way.

[DLO01]

Glad we agree that RWD and FWD diffs work the same way. They both allow the inside and outside wheels to spin at different rates. How they do that is entirely and 100% independant of the drive train type as you can get pretty much all types of LSDs for both.

All in all, spin test sucks. Take your axels out and check it out the right way.

Yep, agreed. Well done man. :cool:

[bennjamin]

Correct me if wrong - the ITR LSD is 1 way yeah , so it cannot engage
with no load on it. IE turning it by hand cannot "engage" it and turn both wheels at the same time

[aimre]

Correct me if wrong - the ITR LSD is 1 way yeah , so it cannot engage
with no load on it. IE turning it by hand cannot "engage" it and turn both wheels at the same time


ITR has a HELICAL Diff.

It uses gears, but can not be fully locked. It can transfer like 5x the tourqe of the slipping wheel to the non slipping wheel.

BUT if one wheel is in the air, it will deliver no tourqe to the grounded wheel (as 5x0 = 0) thus acts like a open diff

[DLO01]

Correct me if wrong - the ITR LSD is 1 way yeah , so it cannot engage
with no load on it. IE turning it by hand cannot "engage" it and turn both wheels at the same time

Yeh, its one way.

And yes I have tried it on my ITR with stock LSD up on the jack. Spin one wheel, the other does not turn.

As we have discussed its the type of LSD that determines how it acts.