Mr Bus, my '81 has lost the "click" in the sliding door
mechanism between "unlock" and "lock."  Before, when
using the key or flipping the little lever inside,
there was a definite "click" between the two states.
Now, slop--and it will "fall" from unlocked to locked
while driving, since there is no click to keep it up.

I've looked at Bentley, ETKA and at the lock with a
mirror and I can't see anything, but I can feel what
the button moves and that it is all slop.

Does anyone with experience with an early version of
the sliding door lock know if there is a spring that
has failed and can be fixed?  Or is the problem inside
the lock box and only a new one will fix it?

Thanks for any experience with these locks or this
problem.  Of course there are duct tape and bungees....

Richard