I have read the article on B series transmissions and could not find an answer to my question. First, I have a 95 GSR I bought used 6 months back. While browsing my Integra forum, I came across a link to bseries.net. I checked out the info on there and could not come to a conclusion. The barcoded number on the bellhousing reads: S80 2019409 By that number I could have several different trannys. When I had the car on the hoist, both wheels turn the same direction. Both wheels lay rubber on the street. LSD was not an option for my car. I went to my local Acura dealer, and he dug up his old microfiche to try and help me identify my tranny. All the numbers for integras were either: Y80 3xxxxxx or S80 3xxxxxx . The partsman said those 3xxxxxx numbers were just sequence numbers and really don't mean anything. So why does mine have a 2? The trans may not be the original, and I just can't figure out what I have. I can't locate any other stampings besides "YSK 2" I can't locate any stamping that says "LSD" Could you be of some assistance? Is there any way to find out without removing the trans? Where exactly would casting numbers, etc. be found that may help me out? Any help would be great! Sorry for the long question. Thanks!