What does an automatic transmission modulator do?
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What does an automatic transmission modulator do?
The vacuum modulator is a vital component of automatic transmissions. It tells the transmission what kind of load is being put on it, allowing the transmission to react with the proper line pressures and shift points. Over time, modulators can develop leaks, suffer ruptured diaphragms, become bent, etc.
How much does a transmission modulator cost?
Depending on the make and model of your vehicle, the cost of the replacement modulator will be around $30 to $80. The labor costs should only be about $50 to $80 because it doesn’t take that long to replace it.
Which of the following are symptoms of a leaking vacuum modulator?
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.
What can cause a transmission to shift hard?
10 Reasons For A Hard Shifting Automatic Transmission
- Cold weather.
- Not enough transmission fluid.
- Worn out transmission fluid or oil.
- Wrong transmission fluid.
- Damaged transmission components.
- Damaged sensors or TCU (Transmission Control Unit)
- Transmission vacuum problems.
- Worn-out automatic transmission.
How much does it cost to fix a transmission control module?
The replacement cost of a transmission control module will be anywhere from $500 to $900. You can expect the parts costs to be around $450 to $700 while the labor costs will be around $50 to $200. Of course, you can order a new TCM online and ask a mechanic what their hourly labor rates are.
What happens when a transmission control module goes out?
Some of the most common signs of transmission control module failure include trouble shifting gears, getting stuck in gear, and lower gas mileage. But there are so many other red flags to look out for. Any signs of a bad transmission control module warrant a trip to your local mechanic.
