I have a 88' std. hatch, and a 5-speed tranny i believe to be an Si tranny laying around that i wanna slap into it. The thing is, all the trannies i have are L3's, and this tranny has 21 splines on it. how can I tell without a doubt that it's a Si tranny or not?

 

https://honda-tech.com/zerothread?id=653723

 

bump,, its a 88 si tranny, that is the only year with a 20 splines, get a 90 or 91 si, newer is beter..

 

thanks for the info

 

Does it have a stamp on it like PL3 3000, PL3 A000, PL3 A1000? 88 tranny's aren't supposed to have these markings. It's about the size of a nickel and located around the fill bolt. Let me know b/c I'm interested. I believe I have an 88 tranny but it's stamped PL3 A100, which is supposed to mean it's 89-91. It's currently on my car so I can't count the splines.

 

r u taLKING about the tranny fluid fill bolt? because i looked on my tranny yesterday, and I could find no stamp saying PL3, but maybe I didn't look by the fill bolt

 

I think so. I can't look at mine now b/c it's at my in-laws but I believe it's there. If you don't see it then it probably doesn't have one. Mista Bone is right once again.

 

look close to the fill plug
there should e a stamp
PL3- XZ00 DX STD tranny
PL3-Y000 Si tranny

X= A
Z=1,3,9
Y=1,3,9
if it has a
_______

 

here's the stamp I found PL3-A000. So it's not an Si.

 

it could be a Si.

Remember the 88-89 Si's used small bearing cases just like the DX/STD trannys.

 

mista bone - how about rpms'? what rpm's would we be at a certain speed? That should clear up everything. Hopefully

Oh and another thing...i think mines a DX tranny and assuming it is what are my options for better gearing? I'm thinking 90-91 Si tranny? What about a ZC cable tranny? I don't want to spend a ton of money if i do upgrade...how hard would it be to swap myself?

Thanks,
VINCE

 

i like to get 88 Si trannies and then swap the input shaft with 91 DX trannies...voila.. 91 Si tranny.