The fitment of the diff is occupying a lot of my thoughts right now. Does anyone have detailed measurements of the OEM VLSD on the 370z?
Dave at Quaife have been helpful on the phone, and it may come down to measurements and discussion between Jez, Dave and me.
Here's some detail:
My car is the 7AT with a VLSD.
I have bought a QDF10L, which is designed for the 350z 5AT, and has been successfully installed in 370z 7ATs with the open diff.
The auto vs. manual have different final drives / crown sizes.
The open vs. VLSD have different shaft lengths on each side (the VLSD is offset).
There isn't a direct replacement for the auto with VLSD, so this means I'm in that annoying unknown quadrant:
350z Manual, OEM diff is Open — Use a QDF11L
350z Manual, OEM diff is VLSD — Use a QDF13L
350z Auto, OEM diff is Open — Use a QDF10L (this also fits the 370z just fine)
350z Auto, OEM diff is VLSD — Err, no idea till we measure it.
Product detail
https://shop.quaife.co.uk/nissan-350z-auto-quaife-atb-helical-lsd-differential
Technical drawings
https://shop.quaife.co.uk/media/blfa_files/QDF10L.pdf — auto open (the one I have here)
https://shop.quaife.co.uk/media/blfa_files/QDF11L.pdf — manual open
https://shop.quaife.co.uk/media/blfa_files/QDF13L.pdf — manual VLSD