The 700r4 transmission speed sensor wiring diagram is an important aspect of the electrical system in vehicles with this type of transmission. This article will provide a detailed overview of the wiring diagram, its components, and how to troubleshoot common problems associated with it.
Overview of the 700r4 Transmission
The 700r4 transmission is a four-speed automatic overdrive transmission that was manufactured by General Motors. This transmission was first introduced in the 1982 GM models and was used extensively in vehicles until 1992. The 700r4 transmission is commonly found in many muscle cars, hot rods and other custom vehicles. Its popularity is due to its durability, reliability and its ability to handle higher horsepower applications.
Components of the 700r4 Transmission
The 700r4 transmission is comprised of several components that work together to ensure smooth shifting and efficient power transfer. Some of the key components of the transmission include:
| Component | Description |
| Planetary Gear Set | This component is responsible for providing the different gear ratios needed to operate the vehicle at different speeds. |
| Torque Converter | This component allows the engine to continue running while the vehicle is stopped, and allows for smooth engagement of the transmission gears during shifting. |
| Valve Body | This component controls the flow of transmission fluid to the various components of the transmission. |
| Governor | This component regulates the shift points of the transmission based on vehicle speed and throttle position. |
| Speed Sensor | This component monitors the speed of the vehicle and communicates this information to the transmission control module. |
Wiring Diagram for the 700r4 Transmission Speed Sensor
The wiring diagram for the 700r4 transmission speed sensor is relatively simple, but it is important to understand the various components and their functions in order to properly troubleshoot any issues that may arise. The speed sensor is typically located on the tailshaft housing of the transmission and is connected to the transmission control module (TCM) using a two-wire connector.
Wiring Diagram Components
The wiring diagram for the 700r4 transmission speed sensor includes the following components:
| Component | Description |
| Powertrain Control Module (PCM) | The PCM is responsible for controlling the operation of the engine and transmission. |
| Transmission Control Module (TCM) | The TCM communicates with the PCM and controls the operation of the transmission. |
| Speed Sensor | The speed sensor sends a signal to the TCM that indicates the speed of the vehicle. |
| Wire Harness | The wire harness connects the speed sensor to the TCM. |
Frequently Asked Questions (FAQ)
Q: What happens if the speed sensor fails?
A: If the speed sensor fails, the TCM will not receive accurate information about the speed of the vehicle. This can result in a variety of shifting problems, including slippage, hard shifting and delayed shifting.
Q: How do I troubleshoot a speed sensor wiring problem?
A: The first step in troubleshooting a speed sensor wiring problem is to visually inspect the wire harness for any obvious damage or wear. If the wire harness appears to be intact, the next step is to use a multimeter to test the continuity of the wires. If the wires show continuity, the problem may be with the speed sensor itself or with the TCM.
Q: Can I replace the speed sensor myself?
A: Yes, the speed sensor can be replaced by a competent DIY mechanic. However, it is important to follow the manufacturer’s instructions to ensure that the replacement sensor is installed correctly and that the wiring is properly connected.
Conclusion
The 700r4 transmission speed sensor wiring diagram is an important part of the electrical system in vehicles with this type of transmission. By understanding the components and functions of this diagram, vehicle owners can troubleshoot common problems and make repairs as necessary. If you are experiencing shifting problems or other issues with your 700r4 transmission, consult a qualified mechanic or transmission specialist for assistance.
