The GV has a small electric air pump to engage the left drive shaft, not vacuum.
Wouldn't a disengaging driveshaft be a better solution than the locking hubs? Then you wouldn't have to get out and lock them.
I was told by the dealer that the diffs were completely different between the auto and manual trans Grand Vitaras. In my manual both the front and rear look like they have 10 bolt carriers. Are there any differences in the rear?
Thanks,
Marc