Tremec TKX Manual 5-Speed Transmission for Chevy 350/305

The TREMEC TKX Manual 5-Speed Transmission is a premium performance transmission engineered for Chevy 350 and Chevy 305 Small Block V8 engines . Designed specifically for aftermarket, muscle car, and restomod applications, the TKX combines modern engineering with classic compatibility, providing exceptional strength, smooth shifting, and overdrive performance for both street and track use. Built from 100% brand-new OEM-quality components , the TKX features high-performance multi-cone synchronizers and hybrid synchronizer rings that deliver crisp, accurate shifts even at engine speeds up to 7,500 RPM . With a torque capacity of 600 lb-ft and the ability to support engine speeds up to 8,000 RPM , it is ideal for naturally aspirated, supercharged, turbocharged, and stroker Small Block Chevy builds. Its slim aluminum case provides improved transmission tunnel clearance, making installation easier in classic Chevrolet cars and trucks. The overdrive fifth gear lowers highway cruising RPM, improving fuel economy, reducing engine wear, and providing a quieter driving experience. Whether you’re restoring a classic Camaro, Chevelle, Nova, C10 pickup, or building a custom hot rod, the TREMEC TKX delivers modern reliability with outstanding performance. Features Genuine TREMEC TKX 5-Speed Manual Transmission Designed for Chevy 305 and Chevy 350 Small Block V8 applications Rated for 600 lb-ft of torque Supports engine speeds up to 8,000 RPM Smooth shifting up to 7,500 RPM Compact aluminum case for improved tunnel clearance Fully synchronized forward gears High-performance multi-cone synchronizers Hybrid bronze and carbon synchronizer rings Three selectable shifter locations Low noise, vibration, and harshness (NVH) Available with multiple overdrive gear ratios Ideal for muscle cars, hot rods, restomods, and classic trucks Gear Ratios (GM Close Ratio) 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 or 0.81:1 (model dependent) Reverse: 2.56:1 Specifications Brand: TREMEC Transmission Type: 5-Speed Manual Model: TKX Application: Chevy 305 / Chevy 350 Small Block Torque Capacity: 600 lb-ft Maximum Engine Speed: 8,000 RPM Shift Capability: 7,500 RPM Case Material: Aluminum Approximate Dry Weight: 99 lbs Input Shaft Spline Count: 26 Output Shaft Spline Count: 31 Release Type: Mechanical or Hydraulic Speedometer Output: Mechanical and Electronic Fluid Capacity: Approximately 2.7 Quarts Recommended Fluid: TREMEC High Performance Manual Transmission Fluid Shifter Positions: Three Bellhousing Included: No Shifter Included: No Recommended Applications Ideal for: Chevrolet Camaro Chevrolet Chevelle Chevrolet Nova Chevrolet El Camino Chevrolet C10 Pickup Chevrolet Bel Air Chevrolet Biscayne Chevrolet Impala Street Rods Pro-Touring Builds Classic Muscle Cars Custom Hot Rods Vehicle compatibility depends on the correct bellhousing, clutch assembly, crossmember, driveshaft, and installation components. Installation Requirements Installation may require: GM-compatible bellhousing 26-spline clutch disc Flywheel Pilot bearing Transmission mount Crossmember 31-spline slip yoke Driveshaft modifications (depending on application) Hydraulic or mechanical clutch linkage TREMEC High Performance Manual Transmission Fluid Professional installation is recommended to ensure proper fitment and reliable operation. Package Includes TREMEC TKX 5-Speed Manual Transmission Shift Rail Plugs Inspection Cover Manufacturer Documentation Additional components such as the bellhousing, shifter, clutch assembly, driveshaft, crossmember, and installation hardware are sold separately unless included in a complete conversion kit. Warranty The TREMEC TKX Manual 5-Speed Transmission is backed by a 1-Year Limited Warranty , covering defects in materials and workmanship under normal use and proper installation.