I have an S4 NA open diff and have found S4 GXL clutch LSD internals available at a good price. Based on https://www.rx7club.com/2nd-generation-specific-1986-1992-17/fc-lsd-thread-894774/ the feedback seems as if they would be a straight swap. Is this correct or am I missing something?

Does the swap have to be into another NA LSD housing?

 

It's a straight forward swap. Just swap carriers, and readjust the the backlash and bearing preload.

 

Sorry to hijack but i dont want to start another thread lol

S5 vert with auto (for now) but looking to throw in a whole s4 gxl rear end

any issues ?

 

No issues with swapping S5 and S4 rear ends. However, your AT driveshaft will not mate to a MT rear end companion flange. You'll also need to swap companion flanges,but doing so will likely alter the pinion shaft preload. To do this correctly, you'll need to install a new pinion shaft collapsible collar and re-torque the companion flange nut until the proper pinion preload is obtained. Alternatively, you could have a driveshaft shop fab up a custom AT driveshaft that will mate with a MT companion flange.