mopar 6 speed transmission

Part # SST-Magnum



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

Close: 2.66, 1.78, 1.30, 1.00, 0.80, 0.63 (Default)
Wide:   2.97, 2.10, 1.46, 1.00, 0.74, 0.50 (Available)


Silver Sport Transmissions PerfectFit Kit Overview

Tremec Magnum Kit Components

  1. Tremec 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
    • Full 12 month warranty with unlimited technical support, 24 month installation window
    • 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. 12 Month Product Warranty
    • Includes 24 month activation delay so you can finish your project.

Optional components included - Can be removed from kit

  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 Pistol Grip Shifter Handle (Wooden Look or Carbon Fiber)
  4. Driveshaft (Upgrades available)


  1. Cryogenic Gear Treatment available


RAM Powergrip 10.5" clutch set, 550 torque capacity. 26 spline x 1-1/8”
hub. RAM POWERGRIP meets the challenge with a combination of organic and metallic
disc friction surfaces that effectively increase the clutch capacity. The 8-spring hub is
equipped with RAM POLYCOIL damper springs encapsulated in polyurethane; this spring
can handle three times the shock load of just the coil spring, and is standard in all RAM
competition discs. The RAM Competition pressure plate in this kit provides 30% more clamp
pressure than stock and meets SFI specifications. At this high level of performance, RAM
POWERGRIP provides surprisingly good driving characteristics with smooth, comfortable
driver control. Sets include pressure plate, disc, release bearing, and alignment tool unless
otherwise noted.
ARP - Pressure Plate Bolts, 3/8-16, 9/16 in. Hex Head, High Performance, V8, Set of 6


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Item# Status Description
SST-Magnum In Stock

6-Speed Magnum Transmission for Mopars - Complete Assembly


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