samhonda95

i've searched and searched but i must not be doin it right....lol

i just busted my tranny and i want to build one. i know you have to make some clearance to put a itr lsd in a b16 case but i don't know where. can someone help me out?

RyanA

In a hydro case, you don't have to clearance it. HOWEVER, the B16 final drive ring gear is a different bolt pattern than the ITR. You will need to get the FD with the larger bolt pattern like the ITR and GSR have.

samhonda95

ok so itr lsd with itr or gsr fd gear will drop right in my hydro b16 case? will someone second this?

building boost

you have to make clearance if the b16 casing is from 94/95 tranny. all 96-01 bseries casings are the same.

gunnerman

it should be a drop in replacement unless otherwise stated. I have an itr lsd if you need one. if you have a ys1 gsr you ended to cut some of the casing to make it fit.

x-s-i-v

if its a cable u have to grind one mettal out no biggie

rsspider

also looking for help rebuilding a y21 tranny, might as weel help you out with what i already know.. and maybe someone can help me later with this..

i have a y21 (b16a2) tranny with 64t FD and 15t countershaft, bought a dc2 lsd without FD ring. the lsd will not bolt up to y21 FD ring as stated before, due to different bolt pattern.
so i bought a 66t final drive ring from a itr with the same bolt pattern as the itr lsd, it nicely bolts to the lsd.

so what i know for sure is:

if you have a Y21 (i believe it's the same as the s4c interior, not sure) tranny, the dc2 lsd and FD will not "bolt" right up just because you have a 15t countershaft, you can't even put the countershaft in it's place.

so if someone has already experienced this, help..
maybe put a 14t countershaft fixes the problem??? 4.7FD?

any help is much appreciated.. thanks in advance!

Derek128

I did the ITR LSD & 98spec JDM ITR 4.785 FD swap to my 2000 Civic Si (hydro)

the LSD bolts on to my 4.4 FD so as my 4.785FD (& both are ten bolts)

my4.4FD is 66t & my countershaft is 15t
& I think when you change ur FD & countershaft
u have to change ur 1st gear as well

well
at least for my 4.785FD Swap I have to







btw if u need 4.4FD gear set
mine stock gear set is for sale
check out my FS thread
http://hondamarketplace.com/showthread.php?t=2551020

rsspider

thanks for you're reply.

i have a 99 civic, i just didn't want to open my civic oem tranny, it's a S4C.
i got a nice deal on a y21, so opened it and wanted to place the lsd on the y21.

can you tell me if the tranny you placed the itr lsd is a S4C? and will the final drive gear of the S4C fit the itr lsd? any other changes needed?

thanks again.

Derek128

if 99-00 civic Si tranny is S4C (i don't really know tranny code)
the ITR LSD will be just fine with S4C

ITR LSD is 10 bolts
S4C 4.4 FG is 10 bolts

I used my S4C's bolts on my ITR LSD & my JDM 98 Spec 4.785 FG (i even tested fit ITR LSD w/ stock 4.4 FG)

honda parts# 91005-P80-E31 is the bearing for ITR lsd
you need two of them

& after u installed the lsd
SHIM it




for the Y21 is from delsol?

u said its FG 64T & countershaft 15T
64/15= 4.266

i don't know how many bolts for the 4.266FG & i don't know if they r the same bolt side

rsspider

Y21 tranny comes in 92-95 (B16A2)civic/94-97 (B16A2) del sol, S4C comes in 96-00 B16A2 civic. at least here in portugal..

here's how it looks..
this is the stock y21 diff (64t), and the itr lsd on the right (66t)


here's what happens when i try to put the stock y21 ring(64t) on the itr lsd, it won't fit.


and here's the same 10 bolt, but in a different pattern fitment, it's the y21 diff with the itr ring.
it doens't work y21 diff with itr ring and it doens't fit itr lsd with y21 ring..


the bolts are all the same size, it's the bolt pattern that's different so i'm not worried about the bolts.
but if you're saying you tested fit ITR LSD w/ stock 4.4 FG (S4C final drive ring gear i believe..) that's means the non-lsd diff from S4C is the same size, bolt pattern and all as ITR LSD, except not beeing LSD, and the same happens with the S4C ring, it should fit the ITR LSD. bit confusing lol

can you please confirm this?? or any other else who has experienced this??
if this is correct i'm about to start removing my S4C gearbox from the car to open it!!

sorry if i've stolen someones thread!! maybe helps someone too..

thanks again!!

rsspider

forgot this image..

this is what happens when i place the itr lsd with itr FD in the Y21 tranny..
the countershaft won't fit, this is a 66t FD and a 15t countershaft..
i don't understand why, cause i know there are many 66/15 trannys


thanks again

xzodiackillerx

the pitch is wrong on the countershaft. I have the same problem. you need to find a matching shaft and ring gear

rsspider

that makes sense..

any ideia if the S4C 15t countershaft is the same pitch as the itr lsd ring?

if not i will only be doing this with a itr countershaft.. anyone has any??

MFactory

The hydro B16A and B18C 4.4 countershafts are interchangeable, it is only the Ring Gear that is different (B16A being small diff, B18C being large diff).

Please be aware though that in Europe, some of the B16A's came with a 4.266, not a 4.4, therefore it will not work. Your Europe ITR's also came with a 4.785 FD, not the 4.4.

However, I wouldn't recommend mixing and matching anyway. Always best to replace both the Ring Gear and Countershaft as a pair.

rsspider

thanks for your reply

yes, that's correct, y21 here came with 4,266 FD (64/15), and yes, i only know of itr's here in europe with 4,785FD.
my doubt is if the tranny that's mounted in my car is 4.4 FD, it's a S4C tranny. if it is i think the itr lsd will fit the s4c ring dif, which would be cool, i'd just open the tranny and put the lsd there..

if not.. might as well sell the itr lsd and ring and buy a specific lsd for my tranny..

MFactory

The LSD won't fit, as the ITR uses the large diff, whereas the B16A uses the small diff.

The only way to tell for sure if your tranny has a 4.4 is to count the teeth.

xzodiackillerx

so a gsr ring gear 66t and a b16 countershaft 15t will mate up? is an LS also 15t ? I may have two LS countershafts .. how can I tell countershafts apart ?

MFactory

Yes, they will mate up, but as I mentioned above, I would suggest not mixing and matching old gears like this. Gears are always best replaced in pairs.

The LS countershafts won't work, as they are 4.266 ratio.

xzodiackillerx

OK so I need a GSR ring and countershaft . the b16 one I have is from an old viscous LSD and is wrong

typeRsmashin

anybody know who have a itr tranny or a b16 tranny??? need one bad for good price cash in hand!!!!