SBC 86-up Tremec TKX 5 Speed Transmission Installation Kit, 500HP

The SBC 86-Up TREMEC TKX 5-Speed Transmission Installation Kit is a complete manual transmission conversion package designed specifically for 1986 and newer Small Block Chevrolet engines equipped with a 1-piece rear main seal. Ideal for 305 and 350 cubic-inch TBI and Vortec engines, this kit provides nearly everything required to install a modern TREMEC TKX 5-speed transmission into your classic muscle car, hot rod, street rod, or truck.

At the heart of the package is the TREMEC TKX 5-Speed Manual Transmission, engineered to handle 600 lb-ft of torque while delivering smooth, precise shifts up to 7,500 RPM. Its compact aluminum case provides excellent transmission tunnel clearance, and the overdrive fifth gear significantly lowers cruising RPM for improved fuel economy, reduced engine wear, and quieter highway driving. Built using premium OEM-quality components, the TKX offers exceptional durability and reliable performance for both street and performance applications.

Designed to eliminate the guesswork of sourcing compatible components, this installation kit includes a steel bellhousing, billet steel flywheel, high-performance clutch kit, hydraulic release bearing, pilot bearing, hardware, and wiring pigtails for a straightforward installation.

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Features

• Complete TREMEC TKX 5-Speed Installation Kit
• Designed for 1986-up Small Block Chevrolet engines
• Fits 305 and 350 TBI & Vortec engines with a 1-piece rear main seal
• Rated for 600 lb-ft of torque
• Smooth shifting up to 7,500 RPM
• Supports engine speeds up to 8,000 RPM
• Compact aluminum transmission case
• Overdrive fifth gear for reduced highway RPM
• Heavy-duty steel bellhousing
• Billet steel flywheel
• High-performance 11-inch clutch kit
• Hydraulic throwout bearing included
• Reverse light and electronic speedometer wiring included
• Ideal for muscle cars, hot rods, classic trucks, and pro-touring builds

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Gear Ratios

• 1st Gear: 2.87:1
• 2nd Gear: 1.89:1
• 3rd Gear: 1.28:1
• 4th Gear: 1.00:1
• 5th Gear: 0.68:1
• Reverse: 2.56:1

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Specifications

• Brand: TREMEC
• Transmission Model: TKX
• Transmission Type: 5-Speed Manual
• Application: 1986-Up Small Block Chevrolet
• Engine Compatibility: 305 & 350 TBI/Vortec (1-Piece Rear Main Seal)
• Torque Capacity: 600 lb-ft
• Recommended Engine Output: Up to 500 HP
• Maximum Engine Speed: 8,000 RPM
• Shift Capability: 7,500 RPM
• 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
• Bellhousing Included: Yes
• Flywheel Included: Yes
• Clutch Included: Yes
• Hydraulic Release Bearing Included: Yes
• Speedometer Output: Mechanical and Electronic
• Fluid Capacity: Approximately 2.7 Quarts

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Kit Includes

• TREMEC TKX 5-Speed Manual Transmission
• Steel Bellhousing
• Billet Steel Flywheel
• 11-Inch Performance Clutch Disc
• Pressure Plate
• Hydraulic Throwout Bearing
• Pilot Bearing
• Bellhousing Hardware
• Flywheel Hardware
• Clutch Hardware
• Reverse Light Wiring Pigtail
• Electronic Speedometer Wiring Pigtail
• Installation Documentation

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Recommended Applications

Ideal for:

• Chevrolet Camaro
• Chevrolet Chevelle
• Chevrolet Nova
• Chevrolet El Camino
• Chevrolet C10 Pickup
• Chevrolet Bel Air
• Chevrolet Impala
• Street Rods
• Pro-Touring Builds
• Classic Muscle Cars
• Custom Hot Rods

Compatible with 1986 and newer 305 and 350 Small Block Chevrolet engines featuring a 1-piece rear main seal.

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Installation Requirements

Installation may require:

• Transmission crossmember
• 1/2″-13 transmission mounting bolts
• Driveshaft modifications
• Transmission mount
• Hydraulic clutch master cylinder
• Hydraulic clutch lines
• Shifter handle
• Transmission fluid
• Bellhousing alignment check and offset dowel pins if required

Professional installation is recommended for proper clutch operation, drivetrain alignment, and long-term reliability.

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Warranty

The SBC 86-Up TREMEC TKX 5-Speed Transmission Installation Kit is backed by a 1-Year Limited Warranty, covering defects in materials and workmanship under normal use and proper installation.