i have a 91 crx with a b18b and i have a s1 tranny in it now which im sure any ls i was having problems with it and i bought a new one off ebay which i looked at it and it says it is any a1 tranny so what tranny is that, which one is actully any ls tranny and are the splines gonna be differant please help quick i need to swap it out but i dont want to jump into it and have to buy a new clutch disc or run into any problems thanks

 

bump anyone is the splines the same thanks

 

Yes the s1 is an LS (US 90-93 Integra RS/LS/GS)
As for the A1 ive never heard of that.