68-72 GTO/LeMans, A-Body, SST Tremec Perfect-Fit 5 Speed TKX Transmission Kit, Auto to TKX

When you convert to the Tremec TKX 5 Speed, you will experience:

• 30-50% increase in fuel economy
• Low RPM cruising for greatly reduced driver fatigue and an improved highway driving experience. Road trips are fun again!
• Reduced engine wear leading to longer engine life
• Cooler engine operating temperatures
• Reduced NVH (noise - vibration - harshness)

TKX Gear Ratios

TKX - 2.87 1.89 1.28 1.00 0.68  (.81 5th gear ratio special order/on request- add to order notes at check out)

Silver Sport Transmissions Overdrive Kit Overview

PerfectFit™ Tremec TKX Kit Components for conversion from an automatic

1. Tremec TKX 5 Speed Overdrive
   • 500-600 torque capacity wide or close ratio.
   • Compact billet aluminum shifter mechanism provides smooth shifting with short throws. True internal offset with perfect factory shifter positioning.
   • Exclusive SST case customization - CNC machined for a PerfectFit™ without compromise to the transmission
   • Thoroughly tested for leaks and performance.
   • Market Leading Warranty 
   • Optional Carbon Fiber Lined Synchronizer blocker ring upgrade for higher rpm shift capability
2. Pilot Bearing
   • Super heavy duty needle roller type with lube seal for long life
3. Flywheel
   • Billet or cast steel depending on your needs/budget
4. Clutch Kit
   • High performance, long life packages with easy pedal effort tailored to your needs
5. Bellhousing & Inspection Cover
   • Titanium-Aluminum OEM type or steel scattershields that meet race safety requirements
6. Mechanical Linkage & Throwout Bearing
7. Pedals
8. Shifter Handle & 5 Speed Ball - Black or White
9. Optional Driveshaft & Slip Yoke
   • Lightweight, steel, custom driveshaft for superior strength. Dynamically balanced for smooth operation and premium solid u-joints come standard. Driveshaft Not included Contact SST or Local Driveshaft Shop.
10. Speedometer Connection
    • Mechanical and electronic compatible
11. Calibrated Speedo Cable or Electronic Speedo Connector - Your choice
12. Reverse Light Connector
13. Isolator Mount
    • Rubber for vibration isolation or optionalheavy-duty poly for track duty
14. Tunnel Template & Ready to install Sheet Metal
    • Not available with Classic Fit TKO
15. Installation Hardware
16. 5 Speed Console Shift Pattern Plate (Chevelle Only)
17. Shift Boot and Trim Ring
18. Detailed Installation Instructions - including free lifetime tech support
19. Market Leading Warranty 

Request a Quote

Optional components offered

1. Carbon Fiber Lined Synchronizer Blocker Ring and Bronze Shift Fork Pad Upgrade
   • For higher rpm shift capability and increased durability
2. Heavy Duty Poly Isolator Mount Upgrade
   • For track duty
3. Hydraulic Clutch Actuator Kit - Modern technology with less pedal effort
   • Master cylinder - high quality Wilwood
   • Heavy-Duty concentric slave cylinder - 1,000,000 cycle service life 
   • Pre-engineered under dash mount for master cylinder - eliminates guess work for easy installation
   • Remote reservoir with hose
   • Braided steel pressure hose
   • Pedal pushrod and all hardware
   • Detailed installation instructions
4. T-Handle Shifter

Request a Quote

Why buy from Silver Sport Transmissions and Butler?

1. Fast Shipping
   • Popular kits are in stock for short lead times
2. Complete Kits
   • Why go to multiple sources for parts? Make one phone call and get things going on your project now.
3. Excellent Customer Service
   • Lifetime tech support
   • Knowledgeable staff
4. Premium Components
   • Only approved, high quality parts are sold by SST.
5. Engineering Know How
   • Only SST has experienced and licensed engineers on staff. We know what fits, what works and how to install it.

***Got a neutral balanced flywheel and externally balanced engine? McLeod flywheel counter balance weight kits are your solution. Their weights when bolted to "0" or neutral balanced McLeod flywheels turn them into an externally balanced application. They offer various bolt-on style counter weights for Chevy, Chrysler, and Ford engine applications. Solve your weight problem with McLeod flywheel counter balance weight kits. These weight kits are made to be used in conjunction with McLeod Racing Flywheels Only!