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Features, Description, Q&A
Neutral Safety Switch Functionality. The Neutral Safety/Back Up Switch for Powerglide transmissions, 1967 models, is engineered to prevent engine start unless the transmission is in neutral or park while activating back-up lights when reverse gear is engaged. It is a vital safety and signaling component within the vehicle’s automatic floor shifter system, ensuring proper transmission operation and compliance with safety requirements.
Construction and Appearance. This switch is a high-quality reproduction featuring correct gauge and color wiring with an original-style connector and clip. It is designed for precise fitment, replicating the original GM part #3900503, and is made from durable materials for long-term use and reliable electrical conductivity. The product is packaged with a color logo header card for professional presentation.
Installation. The installation process requires careful alignment and adjustment of the switch position before operating the shifter handle to prevent damage. The switch mounts directly to the automatic floor shifter designed specifically for Powerglide shifters, eliminating the need for drilling.
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