Question for the trans guru:

Inserted a vaccum gage to measure the vaccum going to the transmission. At idle (aroud 750 RPM) the gage reads 13 in. , at 1000 rpm, the vaccum drops very fast to around 3 in. At WOT (over 4000 RPM), the vaccum drops to zero.

Is the normal behavior of the vaccum control valve so "non-linear"? Intuitively, I thought a linear vaccum drop proportional to the throttle position would make sense. Maybe I need a better gage.

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Shane83SD