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TREMEC TKO, TREMEC Magnum, & SST A41 Conversion Kits for 1958-1970 GM B Body: Impala, Caprice, Bel Air, Bonneville, Grand Prix, Catalina & Biscayne

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Enjoy Life in Overdrive

TREMEC TKO 5-Speed, TREMEC Magnum 6-Speed, and A41 4L60E Automatics for GM B-Body

Silver Sport Transmissions has the best-engineered kits to modernize the powertrain of your 1958-1970 GM B 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, TREMEC 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™ for GM B-Body

TREMEC TKO 5-Speed PerfectFit Kit 1958-1970 GM B Body: Impala, Caprice, Bel Air, Bonneville, Grand Prix, Catalina & Biscayne

The Good Ol' Days Never Had It This Good!

 


Download or print the installation manual here:  Installation Manual
Printer

Download or print a B1 PerfectFit™ flyer here: PerfectFit Kit

 

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

TREMEC TKO 5-Speed PerfectFit Kit 1958-1970 GM B Body: Impala, Caprice, Bel Air, Bonneville, Grand Prix, Catalina & Biscayne

  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 (58-64 come with a slip yoke only)
    • 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 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

 

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 steel, not cast steel, for improved durability and safety.
  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.

 

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.

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 PerfectFit Kit 1958-1970 GM B Body: Impala, Caprice, Bel Air, Bonneville, Grand Prix, Catalina & Biscayne

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 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. Throwout Bearing
  6. Bellhousing & Inspection Cover
    • Titanium-Aluminum OEM type or steel scattershields that meet race safety requirements
  7. Shifter Handle and 5 Speed Ball - Black or White
  8. Driveshaft & Slip Yoke (58-64 come with a slip yoke only)
    • Lightweight, steel, custom driveshaft for superior strength. Dynamically balanced for smooth operation and premium solid u-joints come standard.
  9. Speedometer Connection
    • Mechanical and electronic compatible
  10. Calibrated Speedo Cable or Electronic Speedo Connector - Your choice
  11. Reverse Light Connector
  12. Isolator Mount
    • Rubber for vibration isolation or optional heavy-duty poly for track duty
  13. Tunnel Template & Ready to install Sheet Metal
    • Not available with Classic Fit TKO
  14. Installation Hardware
  15. Detailed Installation Instructions - including free lifetime tech support
  16. Market Leading Warranty - learn more

 

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. T-Handle Shifter

 

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.

T56 Magnum 6-Speed Basic Kit for GM

TREMEC Magnum T56 6-Speed Basic Kit for 1958-1970 GM B Body: Impala, Caprice, Bel Air, Bonneville, Grand Prix, Catalina & Biscayne

Highway Cruising Double Overdrive!

 

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 Basic Kit Overview

Buy Now

 

This is SST's Basic Kit with only the essentials included.  It's perfect for builders able to fabricate or modify their own crossmember and tunnel hump.

 

Tremec T56 Magnum Kit Components

TREMEC T56 Magnum Kit for 1958-1970 GM B Body: Impala, Caprice, Bel Air, Bonneville, Grand Prix, Catalina & Biscayne

  1. Tremec T56 Magnum 6 Speed Double 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. Slip Yoke
  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

 

Optional components offered

  1. Reverse Lockout Control Module
  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 - 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
  4. Flywheel
    • Billet steel, not cast steel, for improved durability and safety.
  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
    • For aftermarket shifters, available in white or black for that classic look. Engraved with a 6-speed shift pattern.

 

Call today and let us assemble a custom kit just for you or buy now online!

A41 4-Speed Automatic Basic Kit for GM

A41 4L60E Basic Kit for 1958-1970 GM B Body: Impala, Caprice, Bel Air, Bonneville, Grand Prix, Catalina & Biscayne

 

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

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

GM 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

GM Basic A41 Automatic 4L60E Kit for 1958-1970 GM B Body: Impala, Caprice, Bel Air, Bonneville, Grand Prix, Catalina & Biscayne

Each Basic 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. Rubber 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. Slip Yoke
  14. Reverse Light Wiring

Request a Quick Quote