TREMEC T56 Magnum 6-Speed Package | 1970-1976 Corvette | LS Engine

TREMEC T56 Magnum 6-Speed Package | 1970-1976 Corvette | LS Engine

TREMEC T56 Magnum 6-Speed Package | 1970-1976 Corvette | LS Engine

Description

TREMEC T56 Magnum 6-Speed Package | 1970-1976 Corvette | LS Engine

Key Features

  • 700 lb-ft torque capacity - handles serious LS power without compromise
  • Double overdrive ratios with 0.74 fifth and 0.50 sixth gears - dramatically reduces highway RPM
  • Multiple gear ratio sets available - 2.66 close ratio or 2.97 wide ratio first gear options
  • 26-spline input shaft with 31-spline output shaft for robust power transfer
  • Triple-cone synchronizers on 1st-4th gears, double-cone on 5th-6th and reverse
  • Dual speedometer pickups accommodate both mechanical and electronic speedometers
  • 140 lbs dry weight - manageable for installation with exceptional strength
  • 3.66-quart fluid capacity using Dexron III ATF or TREMEC HP-MTF
  • Fully customizable package - select transmission ratio, bellhousing, clutch system, hydraulics, and driveshaft
  • Includes fiberglass tunnel extension for proper C3 fitment

Description

The mid-'70s C3 Corvette is a stunning platform that deserves more than a tired emissions-era drivetrain. This complete TREMEC T56 Magnum package delivers modern 6-speed performance to your 1970-1976 Corvette with LS power, transforming it into a true driver's car with the manual transmission experience these cars were built for.

The T56 Magnum represents the pinnacle of TREMEC's engineering, combining TR-6060 architecture with proven TKO features to create the strongest 6-speed manual transmission ever built for the aftermarket. With 700 lb-ft of torque capacity, increased face-width on all gears, and 2-piece laser-beam welded gear construction for superior tooth angle control, the Magnum handles serious power while delivering crisp, precise shifts. The double overdrive configuration - with 0.74 fifth and 0.50 sixth gear options - drops highway RPM dramatically, reducing engine stress and improving fuel economy for long-distance touring.

The C3's transmission tunnel requires modification to accommodate the Magnum's robust case, but MDL includes a precision fiberglass tunnel extension that bonds seamlessly to the original body. Our guided package selection walks you through every component: transmission gear ratios matched to your driving style, aluminum bellhousing options for your specific LS engine, clutch systems sized for your power level, complete hydraulic actuation, speedometer adapters, reverse lockout electronics, and a custom aluminum driveshaft. Every component is selected for compatibility - no guesswork, no fitment issues.

This isn't a basic transmission swap - it's a complete drivetrain transformation. The Magnum's dual speedometer pickups work with both mechanical and electronic speedometers, while the included wiring harnesses integrate cleanly with your C3's electrical system. Whether you're building a pro-touring machine or a refined cruiser, MDL's expertise ensures your package arrives ready to install with full technical support.

Kit Includes

  • TREMEC T56 Magnum 6-speed transmission (choice of 2.66 close ratio or 2.97 wide ratio gear sets)
  • Aluminum bellhousing for LS engines (standard or pivot ball style available)
  • Bellhousing hardware kit (steel or aluminum bolt options)
  • Steel or billet aluminum flywheel (LS1/LS2/LS3, LS7/LS9, or LSX applications)
  • Flywheel bolt set (standard or ARP available)
  • Performance clutch system (multiple disc diameter and material options)
  • Hydraulic clutch pedal assembly
  • Master cylinder kit with reservoir
  • Hydraulic release bearing
  • Braided stainless hydraulic line (24-inch)
  • Billet aluminum shift lever
  • Leather shift boot
  • Speedometer cable adapter (black or silver anodized)
  • Speedometer drive gear (16-21 tooth options based on rear axle ratio)
  • Speedometer gear retaining clip
  • Speedometer harness
  • Reverse lockout controller
  • Reverse solenoid harness
  • Reverse light switch harness
  • 4 quarts TREMEC-approved transmission fluid
  • Fiberglass transmission tunnel extension
  • Polyurethane transmission mount
  • Custom aluminum driveshaft with 1350-series U-joints (specify length and yoke configuration)
  • Lifetime technical support from MDL
Subtotal 0.00 0 selected
Final step

Review your build

Make sure everything looks right. Click Edit on any row to change a choice.

Package total 0.00