SBC 86-up Tremec T56 6 Speed Transmission Installation Kit, 700HP

The SBC 86-Up Tremec T56 6-Speed Transmission Installation Kit, 700 HP is a complete transmission conversion package engineered to simplify the installation of a TREMEC T56 Magnum 6-speed manual transmission behind 1986 and newer one-piece rear main seal Small Block Chevrolet engines. Designed for enthusiasts building high-performance street cars, pro-touring machines, restomods, and muscle cars, this kit includes nearly every major component required for a professional-quality installation while eliminating the guesswork of selecting compatible parts.

At the heart of the kit is the TREMEC T56 Magnum, rated for 700 lb-ft of torque and capable of smooth shifting up to 7,800 RPM. The included performance clutch system supports engines producing up to 800 horsepower, while the 0.63:1 double overdrive allows aggressive rear axle gearing without sacrificing comfortable highway cruising. Designed for 1986-up Chevrolet 305 and 350 TBI/Vortec engines with a one-piece rear main seal, this installation kit provides a modern 6-speed driving experience with exceptional durability and reliability.

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Features

• Complete Tremec T56 Magnum installation kit for 1986-up Small Block Chevy engines
• Designed for one-piece rear main seal SBC applications
• Genuine TREMEC T56 Magnum 6-speed manual transmission
• Rated for 700 lb-ft of torque
• Performance clutch assembly rated for approximately 800 HP
• Double overdrive transmission for improved highway cruising
• Lightweight aluminum transmission case
• Smooth high-RPM shifting up to 7,800 RPM
• Steel bellhousing included
• Hydraulic throwout bearing included
• SFI-approved billet steel flywheel included
• Pilot bearing, hardware, and installation components included
• Reverse lockout, reverse light, and speedometer wiring pigtails included
• Ideal for street performance, autocross, pro-touring, drag racing, and restomod projects

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Gear Ratios

• 1st Gear: 2.66:1
• 2nd Gear: 1.78:1
• 3rd Gear: 1.30:1
• 4th Gear: 1.00:1
• 5th Gear: 0.80:1
• 6th Gear: 0.63:1
• Reverse: 2.90:1

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Specifications

• Transmission: TREMEC T56 Magnum
• Transmission Type: 6-Speed Manual
• Engine Compatibility: 1986-Up Small Block Chevrolet
• Rear Main Seal: One-Piece
• Engine Sizes: 305 CID (5.0L), 350 CID (5.7L) TBI & Vortec
• Torque Capacity: 700 lb-ft
• Clutch Capacity: Approximately 800 HP
• Case Material: Aluminum
• Input Shaft Diameter: 1.125 Inches
• Input Shaft Spline Count: 26
• Output Shaft Diameter: 1.375 Inches
• Output Shaft Spline Count: 31
• Shifter Style: Linkage Operated
• Tailshaft Length: 7.5 Inches
• Bellhousing: Included
• Shifter: Included
• Slip Yoke: Not Included
• Recommended Fluid: Dexron III / Mercon ATF
• Fluid Capacity: Approximately 3.4 Quarts

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Kit Includes

• TREMEC T56 Magnum 6-Speed Manual Transmission
• Steel Bellhousing
• 10-Inch Performance Clutch Disc
• Heavy-Duty Pressure Plate
• SFI-Approved Billet Steel Flywheel
• Hydraulic Throwout Bearing
• Pilot Bearing
• Bellhousing Hardware
• Flywheel Bolts
• Clutch Bolts
• Wiring Pigtails for:
  • Electronic Speedometer
  • Reverse Lockout
  • Reverse Light
• Installation Hardware
• Installation Instructions

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Recommended Applications

Ideal for:

• Chevrolet Camaro
• Chevrolet Chevelle
• Chevrolet Nova
• Chevrolet El Camino
• Chevrolet Monte Carlo
• Chevrolet Malibu
• Chevrolet C10 Pickup
• Chevrolet Bel Air
• Chevrolet Impala
• Street Rods
• Pro-Touring Builds
• Restomod Projects
• Small Block Chevy Performance Vehicles

Designed specifically for 1986 and newer one-piece rear main seal Small Block Chevrolet 305 and 350 TBI/Vortec engines. It is not compatible with 1985 and earlier two-piece rear main seal Small Block Chevrolet engines.

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Installation Requirements

Installation may require:

• Transmission Crossmember
• Transmission Mount
• 31-Spline Slip Yoke
• Custom or Modified Driveshaft
• Hydraulic Clutch Master Cylinder
• Clutch Hydraulic Lines
• Dexron III / Mercon ATF
• Bellhousing Alignment Check (dial indicator recommended)
• Offset Dowel Pins if required

Professional installation is recommended to ensure proper bellhousing alignment, clutch operation, and drivetrain reliability.

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Warranty

The SBC 86-Up Tremec T56 6-Speed Transmission Installation Kit is backed by a 1-Year Limited Warranty, covering defects in materials and workmanship under normal use and proper installation. Individual components may carry separate manufacturer warranties.

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Why Choose the SBC 86-Up Tremec T56 Installation Kit?

The SBC 86-Up Tremec T56 6-Speed Transmission Installation Kit provides one of the easiest and most complete solutions for upgrading a modern Small Block Chevrolet to a world-class manual transmission. With a 700 lb-ft torque-rated T56 Magnum, 800 HP clutch system, double overdrive gearing, SFI-approved flywheel, hydraulic release system, and nearly every critical installation component included, this package eliminates compatibility concerns while delivering outstanding performance, reliability, and everyday drivability for serious street and performance builds.