Golding.racing

hi, do all S4C gearboxes have same ratio's and 4.4 fd.
is it just the diffs that are different?

thanks Adam

David @ Synchrotech

iTrader: (1)

From what I have seen, all the S4C B16 transmissions should come with the same 10 bolt open diff, 4.40 ratio FD and same shaft gear ratios as well. I have seen some with a viscous 14 bolt LSD but I'm not sure if they came that way or if the LSD was installed later.

JuggerNaut-CTR

Theres a myth of the 99-00 si s4c trans being 4.266 final drive, but not a 1 person has ever proven that to be true. All are 4.4FD

David @ Synchrotech

iTrader: (1)

If you look up the OEM part numbers for the countershaft and ring gear on the 99-00 Civic Si S4C they will show that the parts are only available in the 4.40 ratio. The Integra LS 4.266 FD will fit right in the S4C creating the myth that this was an OEM option.

Golding.racing

thanks guys. i'm after a box with 1.458 3rd and 4.4 fd. so looks good, the one i've found also is non lsd so i can upgrade to a clutch type lsd.

crxking1

iTrader: (1)

I own a S4c tranny with a 4.2 final drive. They were made for the European market. So they are not just a myth.

David @ Synchrotech

iTrader: (1)

I am always open to learn something new. We can confirm this by looking up the OEM part numbers on the Honda parts database. Do you know the year make and model of the car that has the Euro S4C that came OEM with a 4.266 FD?

david974

i confirm the 4.266 FD in euro S4c trany, i've already opened 2 of them and both came with this ratio, who suprised me also
the car was a del sol with EK4 swap
i've another one to epen soon,and will confirm again

David @ Synchrotech

iTrader: (1)

We don't see too many Euro transmissions in the USA but I did some research and this is what I was able to find:

http://www.hondaoriginalparts.com/ho...&block_03=8654

The OEM number for the 4.266 countershaft is 23221-P21-E02. This part was used in the 1994 Euro Civic SIR-T and 1998 Civic Vti transmissions along with the close ratio b16 shaft gears but I can't find anything referencing the sticker ID on this trans.

To my knowledge the JDM S4C was first used in 1996 and the Y21/S21 was from 1993-1994. In the USA the 1994-1997 B16 DelSol has the Y21 and S21 transmissions and the 99-00 Civic Si uses the S4C, all with 4.40 ratio FD.

Golding.racing

looks like i've opened a can of worms..
is there any way i can find out the fd ratio from the barcode sticker?

also on a side note, thanks synchrotech. i fitted a 3rd gear carbon synchro and sleeve today that you sent me a couple of weeks back, great product and service.

Golding.racing

ok the box i'm looking at is from a uk 1999 EM1 b16a2.
S4C 1035815 is on the sticker

??

David @ Synchrotech

iTrader: (1)

I don't know of a way to tell by the sticker Id so you may need to open it up and count the teeth on the Fd. My money is on the 4.40 ratio.