I came across a (I believe) 6.5" rear diff about 10 years ago. According to the tag it was a 3.62:1. It looked very much like a 7", but it was very slightly smaller. Also the drive shafts of the 7" diff didn't fit into the 6.5" one.


Here are some pics of the 6.5" and 7" next to each other. The darker one is the 7". Unfortunately I don't have it anymore. I gave it back to the guy selling it to me as it didn't fit my car. From what I can make out of the tag on the diff it said: 83BG4006CD **5F4N3.62.














Here is some info on what diffs were fitted to which cars.