TREMEC TKO, TREMEC Magnum, & SST A41 Conversion Kits for 1978-1988 Regal, El Camino, Malibu, Monte Carlo, Caballero, Cutlass Supreme, Cutlass Cruiser, Cutlass Salon, Bonneville, and Grand Prix

Enjoy Life in Overdrive

TREMEC TKO, TREMEC Magnum, and A41 Automatic for GM G-Body
Silver Sport Transmissions has the best engineered kits to modernize the powertrain of your 1978-1988 GM G-Body.

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, Magnum 6-speed, or the A-41 4-speed automatic overdrive from Silver Sport Transmissions!

  

Tremec TKO PerfectFit™ Kit for GM G-Body

TREMEC TKO 5-Speed 1963-1967 C2 Corvette

 

The good ol' days never had it this good!

 PrinterPrint or view the installation manual.
Watch the installation video.

 

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


PerfectFit™ 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
    • Optional Cryogenic Gear Treatment for 950 lb-ft torque capacity - Learn More
  2. Crossmember
    • CAD designed - high strength, easy bolt in, no frame mods required
  3. Driveshaft & Quick Release 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. Speedo Gear
  7. Reverse Light Connector
  8. Pilot Bearing
    • Super heavy duty needle roller type with lube seal for long life
  9. Isolator Mount
    • Rubber for vibration isolation or optional heavy-duty poly for track duty
  10. Sheet Metal
  11. Installation Hardware
  12. Detailed Installation Instructions - including free lifetime tech support
  13. 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. Cryogenic Treatment Upgrade
    • For increased torque capacity and longer life - Learn More
  3. Heavy Duty Poly Isolator Mount Upgrade
    • For track duty
  4. 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 guess work for easy installation
    • Remote reservoir with hose
    • Braided steel pressure hose
    • Pedal pushrod and all hardware
    • Detailed installation instructions
  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
    • Titanium-Aluminum OEM type or steel scattershields that meet race safety requirements
  8. Shifter Handle
  9. Shifter Ball
    • For aftermarket shifters, 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
 

PerfectFit™ Tremec TKO Kit Components for conversion from automatic

  1. Tremec TKO 5 Speed Overdrive (PerfectFit position for 78-81, stock position for others)
    • 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
    • Optional Cryogenic Gear Treatment for 950 lb-ft torque capacity - Learn More
  2. Pilot Bearing
    • Super heavy duty needle roller type with lube seal for long life
  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 and Inspection Cover
    • Titanium-Aluminum OEM type or steel scattershields that meet race safety requirements
  6. Crossmember
    • CAD designed - high strength, easy bolt in, no frame mods required
  7. Driveshaft & Quick Release Slip Yoke
    • Lightweight, steel, custom driveshaft for superior strength. Dynamically balanced for smooth operation and premium solid u-joints come standard.
  8. Speedometer Connection
    • Mechanical and electronic compatible
  9. Calibrated Speedo Cable or Electronic Speedo Connector - Your choice
  10. Reverse Light Connector
  11. Rubber Shift Boot and Trim Ring
  12. Seat Pan Sag Correction Kit
  13. Pedals
  14. Mechanical Linkage and Throw Out Bearing
  15. Isolator Mount
    • Rubber for vibration isolation or optional heavy-duty poly for track duty
  16. 5 Speed Shift Pattern Plate
    • Maintains original appearance
  17. Corvette Shifter
    • Maintains factory appearance, model year specific
  18. Installation Hardware
  19. Detailed Installation Instructions - including free lifetime tech support
  20. 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. Cryogenic Treatment Upgrade
    • For increased torque capacity and longer life - Learn More
  3. Heavy Duty Poly Isolator Mount Upgrade
    • For track duty
  4. 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 guess work for easy installation
    • Remote reservoir with hose
    • Braided steel pressure hose
    • Pedal pushrod and all hardware
    • Detailed installation instructions
  5. Chrome Hurst Shifter Handle
  6. Shifter Ball
    • For aftermarket shifters, available in white or black for that classic look. Engraved with 5 speed shift pattern. T-Handle also available.

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

TREMEC Magnum 6-Speed Conversion Kit for GM G-Body

TREMEC Magnum 6-Speed Conversion Kit for GM G-Body

Highway cruising double overdrive! 

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 Conversion Kit Overview


Tremec T56 Magnum 6 Speed Double Overdrive
Tremec T56 Magnum Kit Components for conversion from a manual

    • 700 torque capacity wide or close ratio.
    • Perfect factory shifter positioning.
    • Market Leading Warranty - learn more
    • Multicone Synchronizer Blocker Rings come standard for low effort, high RPM shifts
    • Optional Cryogenic Gear Treatment for 950 lb-ft torque capacity - Learn More
  1. Quicktime Bellhousing
  2. Hydraulic Clutch Actuator Kit
  3. Crossmember
    • CAD designed to keep Magnum within specified driveline angles.
    • Compatible with the factory exhaust
  4. Sheet Metal
  5. Driveshaft & Slip Yoke
    • Lightweight, steel, custom driveshaft for superior strength. Dynamically balanced for smooth operation and premium solid u-joints come standard.
  6. Speedometer Connection
    • Mechanical and electronic compatible
  7. Calibrated Speedo Cable or Electronic Speedo Connector - Your choice
  8. Reverse Light Connector
  9. Reverse Lockout
  10. Pilot Bearing
    • Super heavy duty needle roller type with lube seal for long life
  11. Isolator Mount
    • Rubber for vibration isolation
  12. Installation Hardware
  13. Detailed Installation Instructions - including free lifetime tech support
  14. 12 Month Product Warranty
    • Includes 24 month activation delay so you can finish your project.

 

Request a Quick Quote

 

Optional components offered

  1. Cryogenic Treatment Upgrade
    • For increased torque capacity and longer life - Learn More
  2. Heavy Duty Poly Isolator Mount Upgrade
    • For track duty
  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. Reproduction Shifter Handle and Ball
  6. Aftermarket Shifter Handle
  7. Shifter Ball
    • For aftermarket shifters, available in white or black for that classic look. Engraved with 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 Conversion Kit Overview


Tremec T56 Magnum 6 Speed Double Overdrive
Tremec T56 Magnum Kit Components for conversion from automatic

    • 700 torque capacity wide or close ratio.
    • Perfect factory shifter positioning.
    • Full 12 month warranty with unlimited technical support, 24 month installation window
    • Friction Lined Synchronizer Blocker Rings come standard for easy high RPM shifts 
    • Optional Cryogenic Gear Treatment for 950 lb-ft torque capacity - Learn More
    • Lower Cost Option  Classic Fit option available for non-console installations.  Slight trimming of the shifter opening may be required.
  1. Crossmember
    • CAD designed to keep Magnum within specified driveline angles.
    • Compatible with the factory exhaust
  2. Tunnel Patch
    • Available for both steel and fiberglass tunnels
    • Makes a tight seal to keep the weather out of your console.
  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. Quicktime Bellhousing
  6. Shifter Handle and Ball
  7. Driveshaft & Slip Yoke
    • Lightweight, steel, custom driveshaft for superior strength. Dynamically balanced for smooth operation and premium solid u-joints come standard.
  8. Speedometer Connection
    • Mechanical and electronic compatible
  9. Calibrated Speedo Cable or Electronic Speedo Connector - Your choice
  10. Reverse Light Connector
  11. Reverse Lockout
  12. Pilot Bearing
    • Super heavy duty needle roller type with lube seal for long life
  13. Isolator Mount
    • Rubber for vibration isolation
  14. 6 Speed Shift Pattern Plate
    • Maintains original appearance
  15. Installation Hardware
  16. Pedals
  17. 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 guess work for easy installation
    • Remote reservoir with hose
    • Braided steel pressure hose
    • Pedal pushrod and all hardware
    • Detailed installation instructions
  18. Detailed Installation Instructions - including free lifetime tech support
  19. 12 Month Product Warranty
    • Includes 24 month activation delay so you can finish your project.

Optional components offered

  1. Heavy Duty Poly Isolator Mount Upgrade
    • For track duty
  2. Aftermarket Shifter Handle
  3. 6-Speed Pattern Shifter Ball (Classic White or Black)
  4. Cryogenic Treatment Upgrade
    • For increased torque capacity and longer life - Learn More

 

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 Basic Kit for GM

A41 4L60E 1963-1967 C2 Corvette

 

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

Numerous magazines have reviewed the kit: Popular Hot Rodding, Hot Rod, Mopar Action and several blogs say that this transmission will bring your car "into the 21st century!"

 

The A41 4 Speed Automatic Transmission Basic Builder's Kit

This is the basic builder's kit, cutting and/or fabrication will be required for installation.

View the Installation Manual

A41 4L60E 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

EZ-TCU Overdrive Transmission Controller

EZ-TCUThe EZ-TCU™ allows for maximum electronic control over shift points, shift firmness & shift speed. The EZ-TCU™ is fully configured and ready to run right out of the box – no tuning necessary. But for those who demand customization, the unit is also optionally fully programmable based on load, speed and RPM.

  • Maximum electronic control over shift points, shift firmness & shift speed
  • No software, laptop or experience needed
  • Completely intuitive programming interface or optional fully programmable based on load, speed and RPM
  • Multiple shift modes include full manual mode
  • Compatible with popular GM transmissions, including our A41 Automatic 4-Speed
  • Includes transmission control unit, hand-held & wiring harness

 

│Easy Electronic Overdrive Transmission Control • No Laptop, Previous Tuning Experience or Tuning Required

For computer controlled transmissions, nothing beats the new TCI® EZ-TCU™ by FAST™. No software, laptop or tuning experience is required. Simply install this transmission control unit according to the enclosed instructions, and then start the system by answering the simple Setup Wizard questions on the included hand-held unit. It’s that easy; the EZ-TCU™ does all the work for you!


│Optionally Programmable Based on Load, Speed & RPM • Stores (2) Custom Calibrations • Optional Paddle Shifter

The EZ-TCU™ is fully configured and ready to run right out of the box – no tuning necessary. But for those who demand customization, the unit is also optionally fully programmable based on load, speed and rpm. TCI® and FAST™ engineers took a page from the very successful FAST™ EZ-EFI® Self Tuning Fuel Injection System and designed the EZ-TCU™ programming interface to be completely intuitive. There is no real expertise needed if you want to custom program your calibration. The EZ-TCU™ is capable of real-time switchable calibrations, which allows for multiple setups. Run one calibration on the way to the track, and then with the push of a button, have a more aggressive setup ready for the race. The multiple shift modes include full manual mode for using bump or paddle shifters.


│Built-In Self Diagnostic Feature • INCLUDES: Trans Control Unit, Hand-Held Display, OEM-Quality Wiring Harness

Compatible with most popular GM transmissions, including the 4L60E, 4L65E, 4L80E and 4L85E, and the TCI® 6x Six-Speed Transmission. The EZ-TCU™ allows for maximum electronic control over shift points, shift firmness and shift speed. Self diagnostics allow users of every skill level to fully utilize the EZ-TCU™. The complete kit includes the transmission control unit, hand-held unit and wiring harness.


│EZ-TCU™ Information Summary:

  • No software, laptop or experience needed

  • Maximum electronic control over shift points, shift firmness & shift speed

  • Completely intuitive programming interface or optional fully programmable based on load, speed & rpm

  • Compatible w/ GM transmissions, including 4L60E, 4L65E, 4L80E, 4L85E & TCI® 6x Six-Speed

  • Includes transmission control unit, hand-held and wiring harness

  • Included hand-held can operate as electronic dash

  • Multiple shift modes include full manual mode

 

*Requires a Throttle Position Sensor (TPS)

Installation Instructions

 

Request a Quick Quote

GM Basic A41 Automatic 4L60E Kit

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

  • Automatic Transmission - A41 (GM 4L60E / GM 4L65E Aftermarket replacement)
  • EZ-TCU Controller
  • Dipstick and Tube - OEM Style
  • Auxiliary Oil Cooler - High performance for Stage 2 and 3 only, Optional purchase for Stage 1 kits
  • Bellhousing
  • Lock Up Torque Converter - Electronically controlled, stall options available 
  • Throttle Position Sensor - Bolt-on unit provides throttle feedback to computer with just 3 wires
  • Rubber Cooler Lines
  • Speedometer Cable - Mechanical Speedo Cable
  • Hardware - High strength grade 8 fasteners standard
  • Wiring - Plug & Play wiring harness
  • Inspection Cover
  • Slip Yoke
  • Reverse Light Wiring

Request a Quick Quote