Ford Genuine 6R140 MLPS Neutral Safety Switch 2011-2025 Super Duty

Genuine Ford OEM MLPS (Manual Lever Position Sensor) / Neutral Safety Switch, OEM Part Number CC3Z-7H557-B, engineered for the Ford 6R140 six-speed automatic transmission.

What This Part Is: Also referred to as a Transmission Range Sensor (TRS), Detent Assembly, or Gear Position Sensor, the MLPS Neutral Safety Switch is a factory-calibrated internal sensor located on the driver's side of the transmission case. It serves three essential roles: preventing engine start in any position other than Park or Neutral, relaying real-time gear selection data to the Powertrain Control Module (PCM) for correct shift logic, and triggering the reverse lights when Reverse is selected.

Symptoms Of A Failing Unit:

• Vehicle will not crank in Park or Neutral
• Erratic, harsh, or delayed gear shifts
• Incorrect gear position displayed on the instrument cluster
• Transmission warning light or related DTCs
• Reverse lights not functioning

Fitment:

• 2011–2025 Ford F-250, F-350, F-450, F-550 Super Duty (6R140 / 6R100 Transmission)
• Ford E-350 Super Duty (6-Speed)
• Ford E-450 Super Duty (6-Speed)

Important: This part is transmission-specific. Please verify your transmission before ordering.

Why Genuine Ford OEM: Aftermarket range sensors are a common source of comebacks and misdiagnosis in the 6R140 platform. This Genuine Ford part meets the exact OEM calibration standards required for reliable PCM communication, starter interlock operation, and shift performance — guaranteed by Ford's OEM parts limited warranty.

Complete your repair right — add Lubegard Platinum ATF Protectant (Red Bottle) to your service. It eliminates torque converter shudder, restores fluid additive content, and protects your 6R140 from the heat and wear that lead to repeat failures.

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