The rear brakes on my mav 1995 version require regular adjustment, once a year is enough though.
Assume the Auto adjusters do not work, not a bad assumption.
What I do is the following: it may not be suitable for all applications.
Place rear axle on axle stands, slacken off hand brake adjuster under centre console.
Remove 1 hub at a time, adjust adjusters until the hub just goes on.
Apply brakes, several times, hand brake and foot brake to centralise the brake shoes in the hub. Remove hub again and repeat, do same for other side.
Adjust the handbrake adjuster so that the handbrake starts to come on, on first click.
Release hand brake and check for rubbing.
Note, the LSD will ensure that both rear wheels turn together, which can make it difficult to locate which shoes are tight.
A test run may show one hub getting slightly warmer than the other if you have over adjusted them.
My rear brakes have always been the same even after replacing both rear rear cylinders.
Nissan recommend having 6+ clicks or so on the handbrake maybe this will allow the adjusters to work, but I find the brakes work better when I adjust them as above.
When towing 2+ tonnes down hill I do notice the improvement at least for my set up.
Over the last 15+ years of owning my Mav, I only ever recall locking the rear wheels once before the front wheels, normally the front pick up very quickly.
Good tread improves braking a great deal, especially on the front.
My hand brake can hold the Mav and the boat ( 4+ tonnes) on a steep slipway with ease, once the rear brakes are adjusted correctly.
Hope this helps.
