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Old 03-30-2017, 03:46 PM   #6
MARKDTN
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Join Date: Jan 2011
Location: Chattanooga, TN
Posts: 2,200
Re: 1961 Chevy C20 Apache with a 1967 drive train!

Quote:
Originally Posted by Steeveedee View Post
Sounds like the vacuum modulator or the line to it. Pull the modulator vacuum hose up on the manifold and see if there is ATF in it. Since it is a 4X4, it might be easier to just pull the line at the trans. The vacuum modulator is on the passenger's side of the trans. If you get fluid out of it, it's bad. It might be bad anyway, but fluid in the vacuum line is a certainty that it is toast. And they can go bad, just like that, too.
X2 on the modulator
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