Originally posted by jlicrx@Jan 4 2004, 10:46 PM
all 88-91 Civic, CRX and ZC transmissions (4spd & 5spd) are L3 models - PL3/9000 is more than likely a Si, but not definitely - the PL3/9000, PL3/3000, etc. are casting numbers for the back half of the case and can be used to determine whether the transmission has the large or small bearings (PL3/A000 have small bearings) but do not indicate the gearing - for instance, I have a ZC that is PL3/9000, did have a 91 DX that was PL3/3000 and had a 88 Si that was PL3/A000 - the only way to know for sure is to check the gear ratios