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Old 09-12-2011, 10:52 PM
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Powerglide shifting problem, vacuum ?

So here's the problem in my 63 wagon {350/powerglide}, when the modulator line is hooked up I have no up shift, When its disconnected it will up shift then slip at full throttle, Idk its driving me crazy I changed the filter and modulator and its doing the same thing. I have the modulator line hooked to the back of the intake is there to much vacuum? , mind you this is my first powerglide
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Old 09-13-2011, 06:02 AM
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Do you have the throttle linkage from the power glide to the carb hooked up?

The vacuum on a glide only controls internal pressure, not shift timing.

Is this glide a recent rebuild or an old unit ?
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Old 09-13-2011, 05:19 PM
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The linkage is hook to the carb, the powerglide is an old unit it ran fine with my L6, I don't have the kickdown hooked up I just recently found the V8 linkage would this affect shift points? I do plan on going with a th350 when i get some extra cash you know how it is when you have a couple classics , Maybe my glide ready to take a dirt nap or is there still hope for it?
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