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TREMEC TR-4050 Conversion Kits for 2012-2018 Jeep JK

No Obstacles, No Horizon Too Far - 4WD Life

TREMEC TR-4050 2007-2018 JK Jeep

Silver Sport Transmissions has the best-engineered kits to modernize the powertrain of your Jeep Wrangler. Whether you plan to take your vehicle off-road, tow a camper or boat, or cruise the highway, our overdrive transmissions will help you get there.

TREMEC TR-4050 vs Wrangler JK OEM Options

Ultradrive 42RLE, Mercedes-Benz W5A580, Chrystler 545RFE, Chrysler NSG370, TREMEC TR-4050, Jeep JK Wrangler

The 2012-2018 Jeep Wrangler came with a 2.8L diesel*, 3.6L, or 3.8L* engine and one of these transmissions. The TR-4050's 1st and reverse gears are much lower than the options on the stock Wrangler while the TR-4050's 2nd gear is similar to the 1st gear in the OE transmissions. The TR-4050 can be launched out of 2nd gear while driving around town and shifted into 1st to tackle difficult off-road obstacles. We read a few accounts of the 42RLE having trouble backing up steep driveways due to the 2.10 ratio. Forward or reverse, the TR-4050 is geared to get you moving.

The TREMEC TR-4050 doesn’t lose any ground on the highway, the overdriven 5th gear is comparable to the other OE transmissions, maintaining your fuel milage and a comfortable cruising rpm.

The Mercedes-Benz transmission came with the greatest torque capacity of the stock transmissions at 428 lb-ft. The TR-4050 greatly exceeds this number at 600 lb-ft, making it the strongest transmission in the aftermarket. If you’re swapping out to an LS or Gen 3 HEMI, the TR-4050 is a must have.

The TR-4050 is also completely brand new. These OE transmissions can be found rebuilt and remanufactured, but they are no longer available new.

*TR-4050 not available for 2.8L diesel or 3.8L engines

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Tremec TR-4050 for 2012-2018 Jeep Wrangler JK

The toughest 4 letter word on wheels just raised the bar. Your trail-rated 4x4 Jeep will know no boundaries with the TREMEC TR-4050's super-low 6.16 1st and 6.03 reverse. Meanwhile, the .76 overdrive will be very useful when you're on the highway headed to the next trail. The TREMEC TR-4050 will make sure even 10+ years later, you're still having fun out there.


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 Conversion Kit Components 


  1. TREMEC TR-4050 5 Speed Overdrive
    • 600 lb•ft torque capacity
    • 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. Advanced Friction™ Flywheel
  3. Advanced Friction™ Clutch
  4. QuickDraw Bellhousing 
  5. Internal Hydraulic Slave Cylinder Kit 
  6. Rubber Transmission Mount
  7. Reverse Light Wiring Pigtail
  8. STX® Shifter 
  9. Shifter Handle 
  10. Classic 5-Speed Shifter Knob
  11. Hardware
  12. Fluid
  13. Factory Warranty - learn more


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


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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.