The Vacuum line usually connects to the brake booster , or atleast it does in my Ford Explorer
It hooks to a vacuum port on the intake manifold behind the carb.
On a Turbo 350 transmission, the vacuum modulator line connects to the intake manifold. This connection allows the modulator to receive manifold vacuum signals, which helps control the transmission's shifting characteristics based on engine load and throttle position. Properly routing this line is essential for optimal transmission performance.
There is no transmission vacuum hose. That is a vent hose.
On a 1978 El Camino, the vacuum line from the modulator valve typically connects to the intake manifold. This connection allows the modulator valve to receive vacuum signals, which help control the transmission shift points based on engine load and throttle position. Proper functioning of the vacuum line is essential for smooth transmission operation and performance. If the vacuum line is damaged or disconnected, it can lead to erratic shifting or transmission issues.
In a Chevrolet Silverado, the vacuum lines that connect to the transmission modulator are typically located on the engine side, near the intake manifold. One line runs from the intake manifold to the modulator on the transmission, while another may connect to the vacuum source, helping to regulate transmission shifting. It's important to ensure these lines are free of leaks for proper transmission function. For specific routing, consulting a service manual for your model year is recommended.
Check for a vacuum module on the transmission. If you see a vacuum line between the transmission and engine, disconnect the line and look for transmission fluid inside the line. If you see transmission fluid in the line, replace the vacuum module. It probably has a split or damaged diaphragm inside.
The transmission is electronically controlled
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It depends on which distributor and transmission you have. The stock distributor has one vacuum line going to it. An autostick transmission has one line. If you have a manual transmission and a Bosch 009 distributor like most people do, you have no vacuum lines.
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Be sure the vacuum supply line from the engine to the transmission vacuum modulator is not disconnected.