ok, here is the problem. I bought the y1 tranny a few weeks ago and now i found a deal and also bought the ys1 tranny. Im not sure which one to use, both of them have lsd just wanted to have some peoples opinion on it. Eddie

 

y1

 

Any grinds in any of them?

 

i havent used eighther but both have fairly been used. why would you choose the y1 over the other?

 

I believe the Y1 is the "SiR" spec tranny. the gear ratios should be different from the YS1 if I remember correctly.

 

I think the y1 tranny has shorter gears.

 

I think the ys1 has the shortest gears. Only jdm or gsr though.

 

You may be right cant remember.

 

YS1 92-93 GSR USDM or JDM has shortest gear ratio
S1/J1 have same gearing as 96 type-R
Y1 has longer gear ratio
YS1 LS tranny has LONGEST gearing
I would choose YS1 with LSD if it is indeed a GSR trans. if it is a GSR an ypu dont want it PM me ill buy it from you. PM me

 

how can you tell if the ys1 is from a gsr or the ls

 

pop the case an count the teeth on the final drife in the ONLY way

 

So S1 and J1 are the same? My buddy has an XSi B16 with an S1 and mine from an XSi has a J1 and I thought J1 was shorter?