So its been few yrs since on. I ve had twin boys . So my civic sat yr. Im about to get civic fixed once tax money come. I have a 91 civic.si w 1 gen b16 a. My pass. axle need to b changed. My swap came with either s1 or j1. The badge wasnt on tranny. My 4 th was shot. In 5 th tach was 4 k. I now have a y1 several yrs now. Ive been researching & hear i need 90-91 axle. I just read something saying sh3 & sk7 intermed. shaft. If i have y1 tranny as thats what i have now & a sh3 shaft use 89 teg dr. axle & 90 teg pass axle if i have sk 7 inter shaft i need 90 teg axle on both sides. Shop that did swap in 04 not n buisiness from economy. I m getting new axle from advance & honda shop i go to gonna install but wanna get right axle first time & be done. Just not sure which to get. Thanks for your time & any info would be greatly appreciated . Using cell phone.