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Cummins TREMEC TR-4050 Conversion Kits

TREMEC TR-4050 Cummins 

Available for the following applications:

  • 4BT
  • 6BT
  • R2.8
  • 5.0


When you convert to the TREMEC TR-4050 5-Speed, you will experience:

  • Low, rock crawling 1st gear (6.16) and reverse (6.03)
  • Excellent shift feel and performance
  • Crisp, precise shifts
  • Highway cruising with an overdriven gear (.76)


TREMEC TR-4050 Gear Ratios


6.16, 3.11, 1.71, 1.00, 0.76, and 6.03 Reverse


TREMEC TR-4050 Basic Kit Components 


    1. TREMEC TR-4050TREMEC TR-4050 5 Speed Overdrive
      • 425 lb•ft torque capacity (based on 15,000+ lb GVWR)
      • High-contact, constant mesh, helical gears for maximum strength
      • Die-cast aluminum alloy housing saves weight while offering considerable rigidity
      • Standard right-hand, six-bolt PTO offers the ability to run hydraulic pumps
      • The multiple rail, internal shifter provides excellent shift feel and performance
      • Tapered bearing on input, main, and counter shafts provide excellent internal stability
      • Needle bearings under gears reduce friction and noise output
      • Fully synchronized
      • Advanced synchronizer technology promotes smoother shifting and reduced shift effort
      • 5th gear synchronizer mounted to the countershaft to improve NVH in overdrive
      • 3.67 qt oil capacity
    1. Pilot Bearing 
    2. Reverse Light Wiring Pigtail
    3. Factory Warranty - learn more


Optional Parts 

    1. Advanced Friction™ Clutch
    2. Advanced Friction Flywheel
    3. STX® Shifter
    4. Shifter Handle
    5. Shifter Knob
    6. Fluid


Click the 4WD Quick Quote button or call to get a detailed estimate.


4WD Quick Quote


Why buy from Silver Sport Transmissions?

    1. Fast Shipping
    2. Complete Kits
    3. Excellent Customer Service
      • Lifetime tech support
      • Knowledgeable staff
    4. Premium Components
      • Only SST has experienced and licensed engineers on staff. We know what fits, what works and how to install it.