TREMEC Magnum-F TUET17638 – Wide Ratio 6-Speed with 0.50 Overdrive for 1998–2002 GM F-Bodies & LS Swaps

Experience unmatched street and highway performance with the TREMEC Magnum-F TUET17638, a wide ratio 6-speed manual transmission built to directly replace worn-out T-56 units in 1998–2002 GM F-bodies. With its unique 0.50 6th gear, this transmission is perfect for high-horsepower street builds, cruisers, and pro-touring machines that demand maximum drivability and fuel efficiency at cruising speeds.

Leveraging the proven TREMEC TR-6060/Magnum architecture, the Magnum-F TUET17638 delivers 700 lb-ft of torque capacity, crisp and communicative shifts, and the durability you'd expect from OEM muscle car performance.

Gear Ratios (Wide Ratio with Deep Overdrive):

• 1st – 2.97
• 2nd – 2.10
• 3rd – 1.46
• 4th – 1.00
• 5th – 0.74
• 6th – 0.50 (deep overdrive for highway cruising)
• Reverse – 2.90

Key Features & Benefits:

• Direct T-56 Replacement:
  Uses the F-body-specific tailshaft position, making it a bolt-in fit for 1998–2002 LS1 Camaros and Firebirds with minimal modification. Also adaptable to:
  • 1993–1997 LT1 models (requires supporting components)
  • Third-gen F-bodies, LS swaps, and import conversions like A80 Supra, FD RX-7, and more.
• Built for Street & Long Haul:
  The wide ratio gearing and ultra-deep 0.50 overdrive make this the ideal transmission for street-driven performance builds that need low-RPM highway cruising without sacrificing off-the-line performance.
• 700 lb-ft Torque Capacity:
  Tough enough for high-output V8s and turbo builds, thanks to OEM-grade chromoly gears, double/triple cone synchronizers, and a one-piece countershaft.
• Precision Shifting:
  Provides the same snappy, short throws TREMEC Magnums are known for.
• Durable Construction:
  • Rated for up to 7800 RPM
  • Lightweight at just 140 lbs dry
  • Provisions for a cooler circuit
  • 100% brand-new OEM-quality content
  • Backed by TREMEC’s 1-Year Limited Warranty

Ideal For:

• 1998–2002 LS1 Camaros & Firebirds (requires 31-spline slip yoke + driveshaft modification)
• 1993–1997 LT1 F-bodies (flywheel, clutch, and hydraulic changes required)
• LS-swapped classic cars, third-gens, and modern restomods
• Import performance builds like FD RX-7 and A80 Supra
• Pro-touring and street/strip setups that need both power and cruising efficiency

Why Choose the TUET17638?

The Magnum-F TUET17638 takes everything enthusiasts love about the original T-56 and improves it with modern engineering, wider gears, enhanced strength, and a game-changing 0.50 6th gear for ultimate cruising performance. Whether you're building a street beast or a weekend tourer, this is the best wide-ratio Magnum for long-haul performance.

Quick Specs:

• Part Number: TUET17638
• Torque Rating: 700 lb-ft
• Max RPM: 7800
• Weight: Approx. 140 lbs (dry)
• Input Shaft: 26 spline
• Output Shaft: 31 spline
• Shifter Position: F-body specific
• Speedometer: Electronic
• Warranty: 1-Year Limited Warranty

Ready to Replace Your T-56?

Stop searching for usable T-56 cores and outdated parts. The TREMEC Magnum-F TUET17638 is a brand-new, high-performance 6-speed with the perfect balance of brutal strength and everyday drivability. Order yours today and take your build to the next level.

NOTE

• Requires use of a 31-spline slip yoke and modifications to the driveshaft length. Not included
• Requires a change of the flywheel, clutch, hydraulic slave, and other parts. Call for details.

 

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