The differences seem minor... although that could end up being a major problem. I sort of crossreferenced which cars come with which transmission, and the 98+ Civic Type-R and 96+ Civic SiR/SiR II share the Y80 with mine. The differential is out of an S80 though which came in the 96+ Civic Vti, 98+ Civic Type-R, 91-01 LS series Integras, 94-00 Integra SiR-G, 96-00 Integra Type-R (JDM) and 97-98, 00-01 Integra Type-R (USDM). However, Comptech sells an OEM ITR differential and a KAAZ, both of which have the same part number for Type-R's and the GS-R's.
Time for the hammer and die grinder, I think. :thumbup: Thanks for the response.