How can I tell if this Ys1 tranny is from a GSR or LS? I'm planning on swapping in a B16 to replace my GSR while it's getting built. I never really thought about my tranny gearing since I had my GSR turboed for a couple years but since I will be running all motor with the B16, I've read here that an LS Ys1 is not a good match for the B16. These are the only pics I can get my camera into so hopefully it helps a little. The bar code on the tranny has been partially torn so I do not have any other ID for it. I also found this site that gives a good reference on gear ratios between the two. http://allmotorhonda.com/techp...s.htm
Click pics to enlarge.

 

I THINK
BUT
I AM NOT SURE
IT CAME OFF A 92-93 GSR

DID YOU SEARCH
ON THE ACURA PAGE FAQ

TRY THERE IT HAS INTEGRA
STUFF

 

https://honda-tech.com/zerothread/1967953

You can try this if your comfortable with it.

 

ys1 dont not tell you anything
all it means is that its a 92-93 tansmission
it can be a super longer geared ls or a short geared gsr

 

Don't let anyone tell you to take it apart and count the teeth.

Get a magic marker and start spinning the input shaft and counting till the axle shaft goes around once.

https://honda-tech.com/zerothread/1967953

I did that to a YS1 and came up with short gears but they weren't the ratios listed on http://allmotorhonda.com/techp...s.htm for a YS1 GSR they were the ratios listed for a B16/USDM ITR. So either that site is wrong about the YS1 or maybe there were 2 VTEC YS1s, a USDM B17 with a lower 1st gear and a JDM VTEC with B16 hydro gears. or maybe a previous owner of the trans swapped in B16 gears. Years later I confirmed what my calculator told me when I opened the trans to change some pieces and counted the teeth.


Modified by JohnnieChimpo at 9:20 AM 12/11/2007

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JohnnieChimpo &raquo;</TD></TR><TR><TD CLASS="quote">Don't let anyone tell you to take it apart and count the teeth.

Get a magic marker and start spinning the input shaft and counting till the axle shaft goes around once.

https://honda-tech.com/zerothread/1967953

I did that to my YS1 and came up with short gears but they weren't the ratios listed on http://allmotorhonda.com/techp...s.htm for a YS1 GSR they were the ratios listed for a B16/USDM ITR. So either that site is wrong about the YS1 or maybe there were 2 VTEC YS1s, a USDM B17 with a lower 1st gear and a JDM VTEC with B16 hydro gears. or maybe a previous owner of my trans swapped in B16 gears. Years later I confirmed what my calculator told me when I opened the trans to change some pieces and counted the teeth.</TD></TR></TABLE><TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hanmin &raquo;</TD></TR><TR><TD CLASS="quote">https://honda-tech.com/zerothread/1967953

You can try this if your comfortable with it.</TD></TR></TABLE>

Nice. You both directed me to the same post. I'll try this out and hope that I got the GSR Ys1 in there. Thanks again.