Quote:
Originally Posted by mechanicalman
the line that would normally go from the mechanical switchover to the thermo switch just couples directly to the black vent line that goes through the firewall on the passenger side.
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That doesn't sound OK, it seems like having that line vented would cause a vacuum leak. I would plug that line.
Quote:
Originally Posted by mechanicalman
finally, the white line coming from the number one position on the mechanical switch just connects directly to the front most connector on that little check valve looking thing that sits right on the main line coming from pump. does that all sound right?
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That main line is the vacuum supply to the entire system. Plugging that line should take the "mechanical switch" completely out of service and eliminate any leaks there. If you can plug that white line without affecting the transmission shifting, you will eliminate lots of potential leak points. I would give that a try and see what happens.