Help your automatic transmission respond correctly to engine load with the Standard Ignition Automatic Transmission Vacuum Modulator TM-50. This auto trans modulator valve is a direct-fit replacement for many vehicles, among them the 1967-1969 Chevrolet Camaro, 1968-1980 Chevrolet Corvette and 1964-1978 Buick Riviera. Each of these is listed for all engines. See the Buyer's Guide tab for the full list of vehicles.
A vacuum modulator connects to an engine vacuum source through a hose. It uses that vacuum signal to help the transmission adjust to changes in engine load. If a leaking or failed modulator is the cause of your shifting trouble, this unit replaces it.
- Quality control: Standard Ignition is a global manufacturer of original equipment ignition products. It keeps quality control in place through the whole manufacturing process, from individual components to the finished product.
- Research-driven: The unit is backed by decades of research and development focused on what technicians need.
- High-grade material: Standard Ignition's transmission modulators contain high-grade material for peak operation.
- Built for precision: The modulator is designed with a focus on quality to deliver precision. It is also designed to address the failure issues found when original equipment fails.
Specifications: One hose connector, brass finish, and a quantity per application of 1. Country of origin: United States.
Signs a modulator may need replacing: Look for transmission fluid in the vacuum hose, unexplained fluid loss, exhaust smoke, or harsh, late or erratic shifts. Other faults can cause these symptoms too, so diagnose the cause before replacing the modulator.
Interchange: VM324 · TM837 · 3032144 · 359917 · 8629942
This part cross-references / interchanges with the following part numbers:
VM324, TM837, 3032144, 359917, 8629942
