TREMEC TKO, TREMEC Magnum & SST A41 Conversion Kits for MOPAR E-Body: AAR, Barracuda, Challenger, Cuda, Gran Coupe, R/T, SE and T/A

TREMEC Conversion Kits for MOPAR E-Body
Silver Sport Transmissions has the best engineered kits to modernize the powertrain of your 1970-1974 Mopar E-Body. Our PerfectFit™ Kits bring the shifter 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 A41 automatic overdrive from SST!

Use the tabs above to learn more. 

 

Tremec TKO PerfectFit™ Kit for 1970-74 E Body

TREMEC TKO 5-Speed PerfectFit Kit for Mopar E 1970-1974 Challenger Barracuda Cuda AAR Gran Coupe T/A SE R/T

The good ol' days never had it this good!

1970-1974 Barracuda and Challengers

 

Printer

Download or print a E Body PerfectFit™ flyer here:  PerfectFit™ Kit Flyer

Download or print the installation manual here:  Installation Manual

Download or print the firewall stiffener instructions for the hydraulic kit here:  Firewall Installations

 

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)

 

Silver Sport Transmissions Overdrive Kit Overview

Tremec TKO PerfectFit Kit for Mopar E 1970-1974 Challenger Barracuda Cuda AAR Gran Coupe T/A SE R/T

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. 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. Crossmember
    • CAD designed, lightweight, easy bolt in
  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. Tunnel Template & Sheet Metal - ready to install for a professional look
  11. Detailed Installation Instructions - including free lifetime tech support
  12. 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. FlywheelBillet 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. Pistol Grip Shifter Handle - Carbon Fiber look (pictured) also available
  7. 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 E Body PerfectFit™ flyer here:  PerfectFit™ Kit Flyer

Download or print the installation manual here:  Installation Manual

Download or print the firewall stiffener instructions for the hydraulic kit here:  Firewall Installations

 

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 5-Speed PerfectFit for Mopar E 1970-1974 Challenger Barracuda Cuda AAR Gran Coupe T/A SE R/T

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. 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. 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 and Inspection Cover
    • Titanium-Aluminum OEM type or steel scattershields that meet race safety requirements
  5. Crossmember
    • CAD designed, lightweight, easy bolt in
  6. Driveshaft & Slip Yoke
    • Lightweight, steel, custom driveshaft for superior strength. Dynamically balanced for smooth operation and premium solid u-joints come standard.
  7. Speedometer Connection
    • Mechanical and electronic compatible
  8. Calibrated Speedo Cable or Electronic Speedo Connector - Your choice
  9. Reverse Light Connector
  10. Pilot Bearing
    • Super heavy duty needle roller type with lube seal for long life
  11. Isolator Mount
    • Rubber for vibration isolation 
  12. Rubber Boot and Shift Ring
  13. Pistol Grip Shifter Handle - Carbon Fiber look (pictured) also available
  14. Pedal Kit
  15. Throwout Bearing
  16. Installation Hardware
  17. Tunnel Template & Sheet Metal - ready to install for a professional look
  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. 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. Shifter Handle and Balls

 

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 PerfectFit™ Kit for E-Body

TREMEC Magnum PerfectFit Kit for Mopar E 1970-1974 Challenger Barracuda Cuda AAR Gran Coupe T/A SE R/T

Highway Cruising Double Overdrive!

Printer Download or print the basic installation manual here, detailed installation manual available via email:  Installation Manual

 Press: Hotrod Magazine

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 PerfectFit Kit Overview
Keep your torsion bar suspension! Our kit does not require changing to coil over.

Tremec Magnum Basic Kit for Mopar E 1970-1974 Challenger Barracuda Cuda AAR Gran Coupe T/A SE R/TTremec T56 Magnum Kit Components

  1. Tremec T56 Magnum 6 Speed Double Overdrive
    • PerfectFit Shifter position fits inside the factory console
    • 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. SFI Rated Steel Bellhousing
  3. Hydraulic Clutch Actuator Kit
  4. 6-Speed Pattern Shift Handle Insert
  5. Sheetmetal to widen tunnel
  6. Speedometer Connection
    • Mechanical and electronic compatible
  7. Speedo Gear
  8. Reverse Light Connector
  9. Pilot Bearing
    • Super heavy duty needle roller type with lube seal for long life
  10. Crossmember - No need to replace torsion bar suspension. Stronger than the original equipment crossmember.
  11. Isolator Mount
    • Rubber for vibration isolation 
  12. Installation Hardware
  13. Slip Yoke and Driveshaft
  14. Detailed Installation Instructions - including free lifetime tech support
  15. Market Leading Warranty - learn more

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. Reproduction Shifter Handle (Wooden Look or Carbon Fiber)
  4. Cryogenic Gear Treatment
  5. Driveshaft Upgrades 

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.

A41 Automatic PerfectFit™ Kit for E-Body Mopar

A41 4L60E PerfectFit Automatic kit for Mopar E 1970-1974 Challenger Barracuda Cuda AAR Gran Coupe T/A SE R/T

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!"

 Loch's Testimonial and photos

The A41 4 Speed Automatic Transmission

View the Installation Manual

 

Mopar A41

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
  • Stand Alone 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.


│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

A41 4L60E PerfectFit Kit for Mopar E 1970-1974 Challenger Barracuda Cuda AAR Gran Coupe T/A SE R/T

Each PerfectFit™ 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
  • Braided Steel Cooler Lines* - (Rubber Cooler Lines for 1962-67)
  • Speedometer Cable - Mechanical Speedo Cable
  • Hardware - High strength grade 8 fasteners standard
  • Wiring - Plug & Play wiring harness
  • Inspection Cover
  • Driveshaft* - High strength computer balanced with sealed u-joints & slip yoke (Slip Yoke only for 62-67)
  • Reverse Light Wiring
  • Crossmember* - Heavy duty formed steel, powder coated
  • Isolator* - Vibration free, heavy duty rubber isolator

 

*Only Available for 68-74 Model Years

Request a Quick Quote