What are the symptoms of a bad modulator valve?
When you have a bad modulator valve, some or all of the following symptoms will begin to manifest themselves:
- A whistling sound (from a leaking diaphragm)
- White smoke coming out of the exhaust (from a leaking diaphragm)
- Early or late shifting.
- Hard shifts (usually causing the car to jerk)
- A rough idle.
How do you test a transmission modulator valve?
Testing the Modulator
- Block the rear wheels.
- Locate the vacuum modulator on the passenger side rear of the transmission.
- Pull the vacuum hose off the modulator and install the vacuum pump.
- Look for any transmission fluid running out of the vacuum port on the modulator, indicating a broken diaphragm.
How many Chrysler Town and Country cars are there?
Choose from 353 Chrysler Town & Country repairs and services for model years 1990 to 2016 to get a RepairPal Fair Price Estimate™.
What kind of automatic transmission does Chrysler have?
2005-2019 Chrysler W5A580, 5-speed automatic. This was a Chrysler adaptation of the ZF 5HP30 assembly, which was first labelled as the NAG1. After 2010, Chrysler had complete license and manufacturing rights, as other variations were no longer used by other OEM’s.
How is the modulator connected to the engine?
The modulator is connected to the engine through a combination of steel tubing and rubber hoses. When higher amounts of engine vacuum act on the modulator, the transmission begins to shift earlier and softer. As engine loads increase, vacuum diminishes, causing the transmission to shift later…
What kind of transmission does a Chrysler M4 have?
Semi-automatic 1941–1942 M4 Vacamatic — 4-speed (2-range manual control with automatic 2-speed shift vacuum operated) with clutch and fluid coupling (Fluid Drive); also known as Simplimatic, Powermatic