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Originally Posted by rblookc
Right, I dont know why I was calling it the modulator, as the mod. receives vacuum from the amplifier. i guess i lost you with the "Dave" reference. i dont see how it is ok for the amplifier not to reflect proper VCV regulation. None of the literature I have read suggests that I have to drive the car to test for vacuum to the tranny. maybe it's a dumb question, but how do I properly test driving vacuum with the tranny line disconnected? i.e. would I not have to disconnect the tranny vac line to test amplification with a vac gauge while driving?
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Sorry, Dave is "Gsxr", one of the most knowledgeable members regarding the 603.
You cannot get a valid test to see what is going to the tranny unless you drive the vehicle and observe the gauge.
You can set up a T in the output to the tranny where the gauge fits the T and you run the hose into the cabin to monitor the gauge.
Since the tranny vacuum is regulated by boost pressure, you cannot get a proper reading by sitting in your driveway.