My beater is a 91 Civic 4door with a 1996 D16. We think the tranny is the stock 91 LX for the 4 door, but I'm not sure since they are all L3s I believe, even the Si trannies. But with 185/60-14s it turns about 3500 at 75mph. What tranny does that sound like to you guys?

 

ttt

 

with my Si tranny, at about 83mph or so im turning about 4000rpm, so its possible that you have a Si tranny.. although i would more than likely guess a DX.