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Axle · 03-02-2024, 08:45 AM

Do you have a metal line to your vacuum modulator (just rubber line for connections)? If not, the vacuum will suck the line shut.

Vacuum connected to a manifold vacuum source? If connected to a carb make sure you are not on a ported line.

You can drive a th350 with the kickdown cable disconnected (its not a tv cable like an overdrive trans). When you disconnect the kickdown cable does it spring/pull back towards the trans? (too tight if it does).

03-02-2024, 08:45 AM	#20
Axle Registered User Join Date: Jul 2011 Location: SW Ontario Posts: 1,199	Re: 350 wont shift out of first... Do you have a metal line to your vacuum modulator (just rubber line for connections)? If not, the vacuum will suck the line shut. Vacuum connected to a manifold vacuum source? If connected to a carb make sure you are not on a ported line. You can drive a th350 with the kickdown cable disconnected (its not a tv cable like an overdrive trans). When you disconnect the kickdown cable does it spring/pull back towards the trans? (too tight if it does).