TREMEC TKO, TREMEC Magnum, & SST A41 Conversion Kits for 1955-1957 Tri-Five Bel Air, 150, 210 & Nomad

TREMEC TKO 5-Speed, TREMEC Magnum 6-Speed and A41 4L60E Automatic Transmissions for Tri-Five
Silver Sport Transmissions has the best engineered kits to modernize the powertrain of your 1955-1957 Chevy or other GM Tri-Five model. 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!

Use the tabs above to learn more. 

Tremec TKO PerfectFit™ Kit for Tri-Five

TREMEC TKO 5-Speed PerfectFit Kit for 1955-1957 Tri-Five Bel Air, 150, 210 & Nomad

The good ol' days never had it this good!

 

Printer

Download or print a Tri-5/B Body 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)

 

Tremec 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 / 0.82

 

Silver Sport Transmissions Overdrive Kit Overview

Tremec TKO PerfectFit Kit for 1955-1957 Tri-Five Bel Air, 150, 210 & Nomad

  1. Tremec TKO 5 Speed Overdrive
    Choose from these options:

Classic Fit: On-center for bucket seats

Mid Shift: For bench seats, allows full adjustment of seat

Side Offset: Matches exsisting 4 speed floor locations

  • 500-600 torque capacity wide or close ratio.
  • Compact billet aluminum shifter mechanism provides smooth shifting with short throws. Perfect factory shifter positioning.
  • Exclusive SST case customization - CNC machined, 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
  1. Transmission Support Crossmember
  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. Calibrated Speedo Cable or Electronic Speedo Connector - Your choice
  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 
  8. Installation Hardware
  9. Detailed Installation Instructions - including free lifetime tech support
  10. 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. 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
  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 5 speed shift pattern.
  8. Throwout Bearing

 

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

Printer

Download or print a Tri-5/B Body 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)

 

Tremec 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 / 0.82

 

Silver Sport Transmissions Overdrive Kit Overview

TREMEC TKO PerfectFit Kit for 1955-1957 Tri-Five Bel Air, 150, 210 & Nomad

  1. Tremec TKO 5 Speed Overdrive
    Choose from these options:

 

Classic Fit: On-center for bucket seats

Mid Shift: For bench seats, allows full adjustment of seat

Side Offset: Matches exsisting 4 speed floor locations

  • 500-600 torque capacity wide or close ratio.
  • Compact billet aluminum shifter mechanism provides smooth shifting with short throws. Perfect factory shifter positioning.
  • Exclusive SST case customization - CNC machined, 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
  1. Pilot Bearing
    • Super heavy duty needle roller type with lube seal for long life
  2. Flywheel Billet steel, not cast steel, for improved durability and safety.
  3. Clutch Kit
    • High performance, long life packages with easy pedal effort tailored to your needs
  4. Bellhousing & Inspection Cover
    • Titanium-Aluminum OEM type or steel scattershields that meet race safety requirements
  5. Mechaical Linkage & Throwout Bearing
  6. Shift Boot & Trim Ring
  7. Pedal
  8. Transmission Support Crossmember
  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. Shifter Handle & 5 Speed Ball - Black or White
  14. Isolator Mount
    • Rubber for vibration isolation 
  15. Installation Hardware
  16. Detailed Installation Instructions - including free lifetime tech support
  17. 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. 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
  3. 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

T56 Magnum 6-Speed Conversion Kit for Tri-Five

TREMEC Magnum T56 for 1955-1957 Tri-Five Bel Air, 150, 210 & Nomad

Highway cruising double overdrive!

Printer Download or print a Tri-5/B Body 6 Speed flyer here:  Conversion Kit
Download or print the installation manual here:  Installation Manual

 

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 Overdrive Kit Overview

TREMEC T56 Magnum Kit 1955-1957 Tri-Five Bel Air, 150, 210 & Nomad

Tremec T56 Magnum Kit Components for conversion from 3 or 4 speed manual

  1. Tremec T56 Magnum Speed Overdrive
    • 700 torque capacity wide or close ratio.
    • Friction Lined Synchronizer Blocker Rings come standard for easy high RPM shifts
    • Market Leading Warranty - learn more
    • Optional Add the Front Shift Kit for bench seat clearance
  2. Transmission Support Crossmember
  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. Pilot Bearing
    • Super heavy duty needle roller type with lube seal for long life
  8. Isolator Mount
    • Rubber for vibration isolation 
  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. Flywheel Billet steel, not cast steel, for improved durability and safety.
  2. Clutch Kit
    • High performance, long life packages with easy pedal effort tailored to your needs
  3. Bellhousing
    • Titanium-Aluminum OEM type or steel scattershields that meet race safety requirements
  4. Shifter Handle
  5. Shifter Ball - For aftermarket shifters, available in white or black for that classic look. Engraved with 5 speed shift pattern.
  6. Throwout Bearing

 

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

TREMEC Magnum T56 1955-1957 Tri-Five Bel Air, 150, 210 & Nomad

 

Silver Sport Transmissions Overdrive Kit Overview

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.
    • Market Leading Warranty - learn more
    • Friction Lined Synchronizer Blocker Rings come standard for easy high RPM shifts
    • Optional Add the Front Shift Kit for bench seat clearance
  2. Transmission Support Crossmember
  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
  6. Pedal
  7. Shift Boot
  8. Throwout Bearing
  9. Shifter Handle
  10. Shifter Ball
    • For aftermarket shifters, available in white or black for that classic look. Engraved with 6 speed shift pattern.
  11. Driveshaft & Slip Yoke
    • Lightweight, steel, custom driveshaft for superior strength. Dynamically balanced for smooth operation and premium solid u-joints come standard.
  12. Speedometer Connection
    • Mechanical and electronic compatible
  13. Calibrated Speedo Cable or Electronic Speedo Connector - Your choice
  14. Reverse Light Connector
  15. Pilot Bearing
    • Super heavy duty needle roller type with lube seal for long life
  16. Isolator Mount
    • Rubber for vibration isolation oroptionalheavy-duty poly for track duty
  17. 6 Speed Shift Pattern Plate
    • Maintains original appearance (68-69 Camaro Only)
  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. 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 guess work for easy installation
    • Remote reservoir with hose
    • Braided steel pressure hose
    • Pedal pushrod and all hardware
    • Detailed installation instructions

 

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 Automatic Perfect Fit for 1955-1957 Tri-Five Bel Air, 150, 210 & Nomad

 

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 for 1955-1957 Tri-Five Bel Air, 150, 210 & Nomad 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 1955-1957 Tri-Five Bel Air, 150, 210 & Nomad

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