Ok so I have. 99 Si, and I am replacing the CV half shaft on the passenger side. I also need a new seal, that goes into the trans and the CV, keeps the dif fluid in the housing.

Everywhere I go list the same part number (4901), and all have the wrong inside diameter. I compaired the old seal to both shafts and the shafts are the same size. The ID of the 4901 seal is around 1.375", and the original seal is around 1.600", same as the shafts.

WTF is going on? I have tried Autozone and Advanced Auto. Where can I find the correct seal?

 

You can either try ordering for a '94 - '01 Integra (any 5 speed model will do) Parts store may be giving you a D-series seal. Or you can just buy it from Honda, 91205-PC9-711 OIL SEAL (40X62X8) (NOK), lists for $11.75

 

Honda only for seals. I've only ever had one leaker as I nicked the outer part of a seal when tapping it in.

Worst part is I knew it when it happened and should have used a new seal, I thought I could get it by. 300 mile round trip later for a freebie service install of a $7 seal, don't cut corners.