an si tranny will be an s20 B000
u will find s20 b000 stamped in the rear of the tranny on the passenger side i belive maybe driver? where the cv axles go in.. the 92 si ill work with the 98 ex cv axles. if it say s20 a000 than its not an ex or si, its a dx, cx, lx or whatever very long gears. not so nice