New Backup Light Neutral Safety Switch Kit BL 1400U For TH‑350 TH‑400 700‑R4

Backup Light Neutral Safety Switch Kit BL 1400U

The BL 1400U backup light neutral safety switch kit delivers reliable neutral sensing and reverse light activation for automatic transmissions in older trucks and equipment.

Overview

This backup light neutral safety switch kit restores proper starting safety and reverse lamp operation when the original unit fails or wears out. The BL 1400U switch kit is built for automatic transmission applications and is intended for rebuilders, mechanics, and owners keeping work trucks and vintage vehicles on the road. Each kit gives you the switch and mounting hardware needed to complete a single replacement with confidence.

Built For Performance

• BL 1400U switch design for consistent neutral safety operation
• Activates reverse lamps when the transmission is placed in reverse
• Prevents starter engagement unless the transmission is in neutral or park
• Kit form supplies the switch and hardware for a complete install
• Sealed housing resists oil, heat, and vibration in transmission service

Fits These Machines

• for TH-350 automatic transmissions
• for TH-400 automatic transmissions
• for 700-R4 automatic transmissions

On-The-Job Use

• Transmission rebuilds and bench repairs
• Reverse light troubleshooting on automatic-equipped trucks
• Neutral safety start system repair
• Restoration projects on classic GM-era automatic vehicles

Specs At A Glance

Good To Know

Q: Will this switch work with my transmission? A: It is listed for TH-350, TH-400, and 700-R4 automatic transmissions, so confirm your transmission model before ordering. Q: Do I need to adjust the switch after installation? A: Neutral safety switches often require alignment so the engine starts only in neutral and park and the reverse lamps light correctly. Always verify operation after fitting.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.