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TREMEC 4WD TR-4050 from Silver Sport Transmissions

TREMEC TR-4050 5-Speed Kits by Silver Sport Transmissions

TR-4050 4WD 4X4 Ford Cummins GM Chevrolet GMC Jeep Mopar RAM

APPLICATIONS: AMC, Cummins Diesel, Ford, GM, Jeep, and Mopar


  • I6 - 232, 242, 258
  • V8 - 304, 360, 410

Cummins Diesel

  • 4BT
  • 6BT
  • R2.8
  • 5.0


  • 289, 302, 351
  • I6 - 240, 300
  • Modular V8

General Motors

  • SBC
  • BBC
  • LS
  • LT
  • 3rd Gen I6


  • V8 - 318, 340, 360
  • Gen III Hemi

More to come!

Replaces the AX15, NV3500, NV3550, and NV4500 5-Speeds and the NP435A, NP435L, NP435D, NP435E, T18, T19, and SM465 4-Speeds.


RATIOS: 6.16, 3.11, 1.71, 1.00, .76 Rev. 6.03

  • 425 lb•ft Torque Capacity
  • Right Side PTO - 6 bolt
  • 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 ability to run hydraulic pumps
  • Multi-rail shift linkage 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
  • All forward gears and reverse gear synchronized
  • Advanced synchronizer technology promotes smoother shifting and reduced shift effort
  • Counter shaft mounted 5th gear synchronizer improves noise, vibration and harshness in overdrive

Weight and Dimensions

  • 164 lbs dry
  • 19.5" Overall length
  • .590" Pilot diameter
  • 5.125" Index retainer diameter
  • 1.125" Input shaft diameter, 10 spline, 6.5" length


Click Here for a 4WD Quote! 

Silver Sport Transmission Partner Companies

When we launched the TREMEC TR-4050 product, we wanted to bring the TREMEC TR-4050 5-Speed to market quickly for as many applications as possible. We partnered with some of the leaders of the 4WD market to develop adapters, bellhousings, and other accessories needed to make the conversion to the TR-4050 work. Each partnership has something unique to offer. Call Silver Sport Transmissions to learn what's needed to make the conversion for your 4WD vehicle!

Choose a Partner Company to Learn More

Advance Adapters

4WD Projects

Click one of the vehicles below to learn more about some of our past and on going projects.

1964 International Scout

1991 Dodge W250

1964 International Scout 80
-On Going -  

1st Gen Ford Bronco
Premieres Oct. 5 -
9:30 AM EST

1991 Dodge W250
- Completed - 

2002 Jeep Wrangler
- Completed -