VSS/OSS T56 or T6060 Reverse Lockout Unit

If you have uprgraded your vehicle to a Tremec T-56 or T-6060 6-speed transmission, you will need to figure out how you want to drive the 12 volt reverse lockout solenoid.

The reverse lockout is designed to prevent you from accidentally trying to put your transmission in reverse while the vehicle is in motion, which could badly damage your transmission.

Many people either eliminate the reverse lockout by removing it, or they connect the solenoid to the brake light switch. However, this defeats the purpose of the lockout because it allows and easy shift attempt into reverse while the car is in motion. We at Accutach Co. believe that it is much safer to use the lockout as it was intended. Some people simply overpower the lockout with arm strength, but that is a two-handed operation, unless you are Arnold Shwartzenegger. 

The Accutach VSS/OSS T56 Reverse Lockout Unit reads the vehicle's VSS (Vehicle Speed Sensor) or OSS (Output Shaft Sensor) signal. When your vehicle is stopped or very nearly stopped, the T56 reverse lockout solenoid is energized to allow you to easily put the transmission into reverse, making the operation a fast, easy, one-handed operation. 

Note: The VSS/OSS Reverse Lockout Unit no longer requires soldering to the inside of Dallas Mustang Speedcal units.  Simply wire the VSS/OSS Reverse Lockout Unit to the VSS/OSS sensor and ground the Blue wire from the Speedcal.

The unit is now hermetically sealed so it can be zip-tied to the transmission harness under the car. Simply wire it to a switched 12 volt power source (such as the Mustang backup light power), to ground, to the T-56 or T-6060 reverse lockout solenoid and to the OSS/VSS signal  and you will have a safe, easy, convenient way to put your transmission into reverse only when your car is stopped.

You will need to supply the connector for the T-56 reverse lockout solenoid: for T-56, GM part number: 12101857 or ACDelco # PT249. 

Right-click and Save File As or Open in a New Window here to download the Installation Guide.

 The Accutach OSS/VSS T56 T6060 Reverse Lockout Unit is now also being carried by Hanlon Motorsports