I have 2 1986 RX7 differentials sitting in my garage. I was going to scrap them this weekend but first wanted to see if anyone needed them. Both have 3.91 gears and came out of GXL’s with automatics. I’ve removed the limited slips and aluminum housings but will include 2 open diffs. You will need to install the ring gear back on the diff and set backlash.
I’ve like to avoid shipping these since they are heavy. Diffs can be picked up in Hingham, MA Just show up and they are yours.