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TREMEC TKO, TREMEC Magnum, & SST A41 Conversion Kits for 1968-1972 GM A Body: Chevelle, Cutlass, Skylark, GS, 442, GTO, Tempest, Monte Carlo, El Camino, LeMans

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Enjoy Life in Overdrive

TREMEC Overdrive Conversion Kits for 1968-1972 GM A Body: Chevelle, Tempest, GTO, El Camino, LeMans, Skylark, 442, Cutlass, Beaumont, Special

Silver Sport Transmissions has the best-engineered kits to modernize the powertrain of your 1968-1972 GM A-body. Bench seat or buckets, console or no console, we've got you covered. Our PerfectFit™ Kits bring the shifter handle to the factory-correct position for the best possible fit and our billet shifter tower provides short, crisp shifts.

Car shows, close friends, and good times are all within easy reach when you choose a TREMEC TKO 5-speed, TREMEC T56 Magnum 6-speed or  A41 4-speed automatic overdrive from Silver Sport Transmissions!

1968-1972 GM A-body style includes: Chevelle, Cutlass, Skylark, GS, 442, GTO, Tempest, Monte Carlo, El Camino, LeMans, Grand Prix

Use the tabs above to learn more.

Tremec TKO PerfectFit™ Kit for GM A-Body

TREMEC TKO 5 Speed for 1968-1972 GM A Body: Chevelle, Cutlass, Skylark, GS, 442, GTO, Tempest, Monte Carlo, El Camino, LeMans, Grand Prix

The good ol' days never had it this good!

Printer

Download or print a A2 PerfectFit™ flyer here:  PerfectFit Kit

Download or print the installation manual here:  Installation Manual

 

When you convert to the Tremec TKO 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)

 

TKO Gear Ratios

TKO 500 - 3.27, 1.98, 1.34, 1.00, 0.68
TKO 600 - 2.87, 1.89, 1.28, 1.00, 0.64 OR 0.82

 

Silver Sport Transmissions Overdrive Kit Overview

1968-1972 GM A Body TREMEC TKO KitPerfectFit™ Tremec TKO Kit Components for conversion from 3 or 4-speed manual

  1. Tremec TKO 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 - learn more
    • Optional Carbon Fiber Lined Synchronizer blocker ring upgrade for higher rpm shift capability
  2. Driveshaft & Slip Yoke
    • Lightweight, steel, custom driveshaft for superior strength. Dynamically balanced for smooth operation and premium solid u-joints come standard.
  3. Speedometer Connection
    • Mechanical and electronic compatible
  4. Speedometer Gear
  5. Reverse Light Connector
  6. Pilot Bearing
    • Super heavy-duty needle roller type with lube seal for long life
  7. Isolator Mount
    • Rubber for vibration isolation or optional heavy-duty poly for track duty
  8. Tunnel Template & Ready to install Sheet Metal
    • Not available with Classic Fit TKO
  9. Installation Hardware
  10. Detailed Installation Instructions - including free lifetime tech support
  11. Market Leading Warranty - learn more

 

Request a Quick 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 firewall mount for master cylinder - eliminates the guesswork for easy installation
    • Remote reservoir with hose
    • Braided steel pressure hose
    • Pedal pushrod and all hardware
    • Detailed installation instructions
  4. Flywheel
    • Billet or cast steel depending on your needs/budget
  5. Clutch Kit
    • High performance, long life packages with easy pedal effort tailored to your needs
  6. Bellhousing
    • Titanium-Aluminum OEM type or steel scattershields that meet race safety requirements
  7. Shifter Handle
  8. Shifter Ball
    • Available in white or black for that classic look. Engraved with 5-speed shift pattern.

 

Request a Quick Quote

 

Why buy from Silver Sport Transmissions?

  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.

 

Call today and let us assemble a custom kit just for you, or complete a Quick Quote

When you convert to the Tremec TKO 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)

 

TKO Gear Ratios

TKO 500 - 3.27, 1.98, 1.34, 1.00, 0.68
TKO 600 - 2.87, 1.89, 1.28, 1.00, 0.64 OR 0.82

 

Silver Sport Transmissions Overdrive Kit Overview

TREMEC TKO 5 Speed for 1968-1972 GM A Body: Chevelle, Cutlass, Skylark, GS, 442, GTO, Tempest, Monte Carlo, El Camino, LeMans, Grand Prix

PerfectFit™ Tremec TKO Kit Components for conversion from an automatic

  1. Tremec TKO 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 - learn more
    • 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. Driveshaft & Slip Yoke
    • Lightweight, steel, custom driveshaft for superior strength. Dynamically balanced for smooth operation and premium solid u-joints come standard.
  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 optional heavy-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 - learn more

 

Request a Quick 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 the guesswork 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 Quick Quote

 

Why buy from Silver Sport Transmissions?

  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.

 

Call today and let us assemble a custom kit just for you, or complete a Quick Quote

Magnum 6-Speed PerfectFit™ Kit for GM A-Body

TREMEC Magnum T56 6 Speed for 1968-1972 GM A Body: Chevelle, Cutlass, Skylark, GS, 442, GTO, Tempest, Monte Carlo, El Camino, LeMans, Grand Prix

Highway Cruising Double Overdrive!

 

Printer Download or print the installation manual here:  A2 Installation Manual

 

When you convert to the Tremec Magnum 6-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)

 

TREMEC Magnum Gear Ratios

2.66, 1.78, 1.30, 1.00, 0.80, 0.63
2.97, 2.10, 1.46, 1.00, 0.80, 0.63

 

Silver Sport Transmissions Magnum 6-Speed PerfectFit™ Kit Overview

TREMEC Magnum T56 6 Speed for 1968-1972 GM A Body: Chevelle, Cutlass, Skylark, GS, 442, GTO, Tempest, Monte Carlo, El Camino, LeMans, Grand Prix

 

Tremec Magnum Kit Components for conversion from a manual

  1. Tremec Magnum 6 Speed Double Overdrive
    • 700 torque capacity wide or close ratio.
    • Perfect factory shifter positioning.
    • Market Leading Warranty - learn more
    • Friction Lined Synchronizer Blocker Rings come standard for easy high RPM shifts
    • Lower Cost Option  Classic Fit option available for non-console installations.  Slight trimming of the shifter opening may be required.
  2. Crossmember - Choose Chevy or BOP
    • CAD designed, lightweight and box welded for rigidity
    • Better exhaust clearance and rigidity compared to tubular or aluminum variants
  3. Driveshaft & Slip Yoke
    • Lightweight, steel, custom driveshaft for superior strength. Dynamically balanced for smooth operation and premium solid u-joints come standard.
  4. Speedometer Connection
    • Mechanical and electronic compatible
  5. Calibrated Speedo Cable or Electronic Speedo Connector - Your choice
  6. Reverse Light Connector
  7. Cutting Template & Tunnel Patch
  8. Body Seal Panel
    • Keep water and dirt out
  9. Pilot Bearing
    • Super heavy-duty needle roller type with lube seal for long life
  10. Isolator Mount
    • Rubber for vibration isolation
  11. 6 Speed Shift Pattern Plate (Chevelles)
    • Maintains original appearance
  12. Installation Hardware
  13. Detailed Installation Instructions - including free lifetime tech support
  14. Market Leading Warranty - learn more

 

Request a Quick Quote

 

Optional components offered

  1. Heavy Duty Poly Isolator Mount Upgrade
    • For track duty
  2. Hydraulic Clutch Actuator Kit - Modern technology with less pedal effort
    • Master cylinder - high-quality Wilwood
    • Heavy-Duty concentric slave cylinder - 300,000 stroke service life 
    • Pre-engineered firewall mount for master cylinder - eliminates the guesswork for easy installation
    • Remote reservoir with hose
    • Braided steel pressure hose
    • Pedal pushrod and all hardware
    • Detailed installation instructions
  3. Flywheel
    • Billet steel, not cast steel, for improved durability and safety.
  4. Clutch Kit
    • High performance, long life packages with easy pedal effort tailored to your needs
  5. Bellhousing
    • Titanium-Aluminum OEM type or steel scattershields that meet race safety requirements
  6. Shifter Handle
  7. Shifter Ball
    • For aftermarket shifters, available in white or black for that classic look. Engraved with a 6-speed shift pattern.

 

Request a Quick Quote

 

Why buy from Silver Sport Transmissions?

  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.

 

Call today and let us assemble a custom kit just for you, or complete a Quick Quote

When you convert to the Tremec T56 Magnum 6-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)

 

Tremec T56 Magnum Gear Ratios

2.66, 1.78, 1.30, 1.00, 0.80, 0.63
2.97, 2.10, 1.46, 1.00, 0.80, 0.63

 

Silver Sport Transmissions Magnum 6-Speed PerfectFit™ Kit Overview

TREMEC Magnum T56 6 Speed for 1968-1972 GM A Body: Chevelle, Cutlass, Skylark, GS, 442, GTO, Tempest, Monte Carlo, El Camino, LeMans, Grand Prix

PerfectFit™ Tremec T56 Magnum Kit Components for conversion from automatic

  1. Tremec T56 Magnum 6 Speed Double Overdrive
    • 700 torque capacity wide or close ratio.
    • Perfect factory shifter positioning.
    • Market Leading Warranty - learn more
    • Friction Lined Synchronizer Blocker Rings come standard for easy high RPM shifts
    • Lower Cost Option  Classic Fit option available for non-console installations.  Slight trimming of the shifter opening may be required.
  2. Crossmember - Choose Chevy or BOP
    • CAD designed, lightweight and box welded for rigidity
    • Better exhaust clearance and rigidity compared to tubular or aluminum variants
  3. Cutting Template & Tunnel Patch
  4. Body Seal Panel
    • Keep water and dirt out
  5. Flywheel
    • Billet steel, not cast steel, for improved durability and safety.
  6. Clutch Kit
    • High performance, long life packages with easy pedal effort tailored to your needs
  7. Bellhousing
  8. Shifter Handle
  9. Shifter Ball
    • For aftermarket shifters, available in white or black for that classic look. Engraved with a 6-speed shift pattern.
  10. Driveshaft & Slip Yoke
    • Lightweight, steel, custom driveshaft for superior strength. Dynamically balanced for smooth operation and premium solid u-joints come standard.
  11. Speedometer Connection
    • Mechanical and electronic compatible
  12. Calibrated Speedo Cable or Electronic Speedo Connector - Your choice
  13. Reverse Light Connector
  14. Pilot Bearing
    • Super heavy-duty needle roller type with lube seal for long life
  15. Isolator Mount
    • Rubber for vibration isolation
  16. 6 Speed Shift Pattern Plate for Chevelle
    • Maintains original appearance 
  17. Installation Hardware
  18. Detailed Installation Instructions - including free lifetime tech support
  19. Market Leading Warranty - learn more

 

Request a Quick Quote

 

Optional components offered

  1. Heavy Duty Poly Isolator Mount Upgrade
    • For track duty
  2. 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 firewall mount for master cylinder - eliminates the guesswork for easy installation
    • Remote reservoir with hose
    • Braided steel pressure hose
    • Pedal pushrod and all hardware
    • Detailed installation instructions

 

Request a Quick Quote

 

Why buy from Silver Sport Transmissions?

  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.

 

Call today and let us assemble a custom kit just for you, or complete a Quick Quote

A41 4-Speed Automatic PerfectFit™ Kit for A-Body

A41 4L60E Automatic conversion kit for 1968-1972 GM A Body: Chevelle, Cutlass, Skylark, GS, 442, GTO, Tempest, Monte Carlo, El Camino, LeMans, Grand Prix

Put it in drive and watch the gas stations go by.

The A41 4 Speed Automatic Transmission

64-67 Installation Manual / 64-67 Hardtop Installation Manual68-72 Installation Manual / 64-67 Crossmember Instructions / 68-72 Crossmember Instructions / 64-67 Tunnel Instructions

 

A41 4L60E Automatic A41 Ratio: 3.06, 1.63, 1.00, 0.70

 

Available in three stages:

Stage 1 - 450 Torque
Stage 2 - 550 Torque
Stage 3 - 650 Torque

 

Features:

  • Low RPM Cruising
  • Great Shift Quality
  • Dyno Tested
  • Electronic Controller
  • Lockup Torque Converter with Optional Stall Speeds
  • No Tunnel Cutting 

 

The A41 is an excellent way to replace your tired 904, 727, 518, Powerglide, TH350 (Turbo 350), TH400 (Turbo 400), 200R4 (200-4R) or 700R4 with modern technology that offers better acceleration and a 30% reduction in cruising rpms.

 

Request a Quick Quote

COMPUSHIFT Sport

COMPUSHIFTThe COMPUSHIFT Sport is the next generation of transmission controllers.

  • All the connectors - The COMPUSHIFT Sport transmission controller looms come with a full set of Plug and Play OEM Connectors for all supported transmissions - making installation effortless.
  • Smart Phone Integration - COMPUSHIFT Sport brings you the first-ever smartphone integrated transmission controller. This makes programming dead easy – allowing programming via Android or iOS smartphones, tablets, PCs and Macs. Connectivity includes both Bluetooth and dual independent CAN bus networks. All software is included.
  • Fully Customize Your Transmission - Get full and precise control of the shifting strategy for your transmission. COMPUSHIFT Sport and Pro are delivered with versatile factory-set programming for a wide variety of transmission and engine combinations. However, you can completely customize settings to your exact specifications.

 

COMPUSHIFT Sport Technical Specifications

COMPUSHIFT

Smart Phone / Tablet / Computer Integration:

  • COMPUSHIFT Sport brings you the first-ever smartphone integrated transmission controller. This makes programming dead easy – allowing programming via Android or iOS smartphones, tablets, PCs and Macs. Connectivity includes both Bluetooth and dual independent CAN bus networks. All software is included.

 

Control:

  • Get full and precise control of the shifting strategy for your transmission. COMPUSHIFT Sport and Pro are delivered with versatile factory-set programming for a wide variety of transmission and engine combinations. However, you can completely customize settings to your exact specifications.
  • Fully adjustable shift speeds, shift feel and torque converter clutch control.
  • Provides adjustable output for speedometer calibration.

 

Compatibility:

  • COMPUSHIFT has the capability of communicating with many different factory and aftermarket engine controllers for quick plug and play setup. No wire splicing required.
  • Uses industry-standard trouble codes

 

Ease of Setup:

  • All The Connectors - The COMPUSHIFT Sport transmission controller looms come with a full set of Plug and Play OEM Connectors for all supported transmissions - making installation effortless.
  • COMPUSHIFT software is upgradeable in the field via Bluetooth. Updates are available via Google Play, Kindle and the Apple App Store.
  • Two full sets of calibration modes that can be selected by button or app.
  • Transfer case switch input for shift/speedometer calibration in low range / 4WD vehicles.

 

Durability:

  • Highly Water and Dust Proof - IP65 Rated

 

Request a Quick Quote

A41 4L60E Automatic conversion kit for 1968-1972 GM A Body: Chevelle, Cutlass, Skylark, GS, 442, GTO, Tempest, Monte Carlo, El Camino, LeMans, Grand Prix

Each PerfectFit™ Kit comes with the correct components for your application and will include the following parts:

 

  1. Automatic Transmission - A41 (GM 4L60E / GM 4L65E Aftermarket replacement)
  2. COMPUSHIFT Sport Controller
  3. Dipstick and Tube - OEM Style
  4. Auxiliary Oil Cooler - High performance for Stage 2 and 3 only, Optional purchase for Stage 1 kits
  5. Bellhousing 
  6. Lock Up Torque Converter - Electronically controlled, stall options available 
  7. Throttle Position Sensor - Bolt-on unit provides throttle feedback to the computer with just 3 wires
  8. Braided Steel Cooler Lines
  9. Speedometer Cable - Mechanical Speedo Cable
  10. Hardware - High strength grade 8 fasteners standard
  11. Wiring - Plug & Play wiring harness
  12. Inspection Cover
  13. Driveshaft - High strength computer balanced with sealed u-joints & slip yoke
  14. Reverse Light Wiring
  15. Crossmember Perch
  16. Isolator - Vibration-free, heavy-duty rubber isolator 

 

Request a Quick Quote