So Ive had this problem that I would like to revisit now that my RB'd S13 is up and running. I long ago purchased a clean low mileage r33 GTST rear diff. I remember that it locked perfectly when I bought it as in, I grabbed the stubs and tried to rotate them independent of each other and they immediately locked, thinking this meant that all was beuno I brought it home and prepared for install.
During the install, since I wanted to keep my stock 6 paired holes axles I decided to swap the half shafts out of the stocker and into the new diff. Now I remember that the axles shafts were different lengths when I compared them, but were the same spline count. After swapping the stubs, the diff no longer locked with hand pressure. I thought nothing of it until after the install was over and drove it....it felt exactly like an open, as in NO LOCK.
Now I know there is a possibility that the diff was old and worn but why did it lock prior to the stub change?
More worryingly, Its been years since I did the swap, and the car has sat for almost as long, so I was very young and stupid when I did the swap. Thinking back, there is a GREAT possibility that I switched the 6 bolt shafts when putting them in
. Could this lead to the diff malfunction? heres a pic that might show what Im talking about, here the 300zx and s13 shafts are being compared.
