I Might Just Know What I'm Talking About
Join Date: Sep 1999
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Re: front axle won\'t engage
On my 88, IIRC the vac disconnect system was connected to Mr. Engine [img]/ubbthreads/images/graemlins/wink.gif[/img] on the top of the intake manifold, and it was a RED line. It connected toward the back of the manifold, near the firewall.
Yes, the system won't work without some vacuum from the engine.