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How do you replace a transmission vacuum modulator on a 1992 Ford Aerostar?
Wiki User
∙ 12y ago
This is from a Chilton's manual: The vacuum control modulator is accessible from under the vehicle on the driver's side.
1. Disconnect the Negative battery cable. 2. Fully engage the emergency brake, put in NEUTRAL with blocks behind the rear wheels to prevent vehicle from rolling. 3. Raise the vehicle and support it safely on jackstands. 4. From underneath the vehicle, remove the vacuum hose attached to the vacuum assembly. Inspect the hose for cracks or tears and replace if needed. 5. Remove the vacuum diaphragm retainer bolt and clamp securing the assembly to the side of the transmission. Do not bend or pry the clamp during removal. 6. Remove the vacuum control modulator and rod from the transmission body. If the assembly is difficult to remove, twist the modulator back and forth while carefully pulling it out. 7. Once removed, install the vacuum control rod back into the transmission assembly. - To install: 8. Apply a thin coat of oil around the edge of the vacuum control assembly and install into the transmission using a twisting back and forth motion. 9. Secure the vacuum assembly using the retainer bolt. Tighten the bolt to 80-106 inch pounds (9-12 Nm). 10. Connect the vacuum hose to the control assembly. 11. Lower the vehicle and connect the Negative battery cable
Wiki User
∙ 12y ago
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