Editing Z31/vlsdInstall php (section)

=== Method 4 ===

The fourth way to make hybrid VLSD axles—this being the most determined and bold method—is to once again use Z31 and J30 axles.

Let’s say you have an original NA Z31 (with T-T axles and 3x2 bolt hub companion flanges), and you get a J30 VLSD with BDO axles. Technically, to make this work, you’d need Z31 turbo half shafts and 4-bolt hub companion flanges. But, if you can’t find any 4-bolt hub flanges locally and don’t want to swap, you can marry the two axles together:

Remove the inner CV joint from the Z31 NA half shaft and join the inner J30 CV joint on the axle—by welding the inner race onto the shaft. Move the inner race about 1.5 inches closer to the center of the shaft to compensate for the length added by the J30 input shaft.

Now you have a VLSD hybrid axle that bolts up to the Z31 NA hub companion flange and connects to the 5-bolt input shaft of the J30 VLSD.

https://dev.z31library.com/xenonzcar_archive/z31/images/VLSDinstall/Method4-part-1.png

https://dev.z31library.com/xenonzcar_archive/z31/images/VLSDinstall/Method4-part-2.png

https://dev.z31library.com/xenonzcar_archive/z31/images/VLSDinstall/Method4-part-3.png

https://dev.z31library.com/xenonzcar_archive/z31/images/VLSDinstall/Method4-part-4.png

https://dev.z31library.com/xenonzcar_archive/z31/images/VLSDinstall/Method4-part-5.png