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TUET11009 - GM LS T56 Magnum Street Transmission

This product may require vehicle validation(s) for proper fitment. Please contact us to confirm correct vehicle fitment and usage.

Pricing: $3,050.00

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The kingpin of TREMEC's high performance line-up, the T-56 Magnum double-overdrive 6-speed transmission takes the very best from TREMEC's current OEM technologies and pairs it with the most popular features of the TKO 5-speed.

Able to withstand a massive 700 lb-ft. of torque while providing unbelievably crisp shifts, no other manual transmission on the planet offers as much combined strength, versatility, and general ease-of-use as the T-56 Magnum.

Known in its original equipment form as the 'TR-6060', the Magnum is an aftermarket version of the same transmission found in many of today's most celebrated factory super cars – including the ZR1 Corvette and ACR Viper – giving you refinement where you want it and strength where it counts.


  • New synchronizers featuring fine tooth angles
  • Bolstered one-piece countershaft to resist distortion
  • 12 Tooth Reluctor
  • Stronger input shaft
  • Re-designed shift forks
  • An extensively modified transmission case to prevent leaks under high-stress conditions and increase overall power-handling capabilities
  • Street - (1st-2.66, 2nd-1.78, 3rd-1.30, 4th-1.00, 5th-0.80, 6th-0.63)

T56 Installation Items
Complete Installation Packages
Speedometer Signal Sensor electrical connector with leads
Speedometer Signal Sensor hole block-off plug with seal
Back Up Lamp Switch electrical connector with leads
1st Speed Solenoid electrical connector with leads
Drive Shaft Slip Yoke for use with 1330 U-joints
Tremec recommended Dexron III fluid, requires 4.1QT or 130oz. Tremec transmission are shipped without fluid.

Application List



  • TUET11009
  • TUET11009
  • Tremec
  • New

Shipping Information

  • Item Requires Shipping
  • 200.0 lbs.

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