On Sat, 15 May 2004, David Marshall wrote:

> As a potential solution to this, I though of perhaps installing a spring
> on the vacuum actuator for the front differential lock that will apply
> outward pressure on the locking pin, so if vacuum to the actuator is
> lost, the force of the spring would make it go in the open position.
>
> Does anyone have any thoughts or ideas on this 'brain wave' of mine?

Well, the question is why didn't they do it that way to begin with and
save half the plumbing?  The only thing I can think of is that if you lose
vaccuum (maybe you go to WOT for long enough for the reservoir to bleed
down, or your check valve fails) the diff lock would disengage, maybe at
an inopportune moment.

David Brodbeck, N8SRE
'86 Volvo 240DL wagon
'82 VW Vanagon Westfalia Diesel