The only Tremec T-56 Magnum harness you'll ever need. A single pre-wired harness that handles reverse lockout, dual VSS speedometer output, and reverse lights — all tunable from your phone via Bluetooth. Replaces up to 5 separate parts with one clean install.

Choose the correct variant for your transmission:

Variations

7100000 Standard T-56 Magnum, Magnum XL, & Mustang GT500 TR6060 

7100001  Borg Warner GM Non-Magnum T-56 (1993–2002 Camaro/Firebird). Includes Borg Warner GM VSS connector. Will NOT work for Ford or Viper.

7100002  GM Super Magnum, Magnum F, & 2010-up Camaro TR6060. Has GM VSS connector. 

Not sure which one you need? Contact us before ordering — wrong-fit returns are a hassle for both of us.

Key Features

• Bluetooth app tuning — connect with any iOS or Android phone and customize every input/output setting (free app)
• Dual independent VSS outputs — drive your speedometer and ECM with different pulse counts/ratios from the same harness (pre-set: 40 pulse + 16 pulse, both adjustable)
• Auto-shifting signal output — pushes ±5V square wave OR 0 to +10V positive-only, depending on what your ECM needs
• Smart reverse lockout — user-defined speed setting (default: locked above 4 mph, unlocked 0–3 mph) instead of a crude on/off switch
• Pre-wired reverse light output — single output wire, ground locally at the bulb
• Epoxy-sealed control box — mounts to the VSS output using the existing bolt

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Why this matters

Getting the right speed sensor signal and properly controlling the reverse lockout are the two most frustrating parts of a T-56 Magnum swap. Most builders end up with up to 5 separate components, a tangle of wiring, and still don't have proper lockout control. The All-in-One harness puts everything in one weatherproof package.

The reverse lockout solenoid is a spring-loaded pin that prevents accidental shifts into reverse when going for 5th gear. Hardwiring it to a brake-light switch (the common DIY method) works but overworks the solenoid and shortens its life. This harness uses a speed-based trigger like the OE system does — and lets you tune the trigger speed from the app.

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What's included

• All-in-One harness
• Epoxy-sealed control module
• Pre-wired connections for reverse lockout, dual VSS, and reverse lights
• Free iOS/Android app for customization

Click here to view installation instructions.

*NOTE* Magnum XL users- this version will not interface with the 2019 and up Mustang VSS wiring.