NV4500/TR4050 to Dana 20 Transfer Case Adapter, 66-77 Ford Bronco SKU: 8470

Early Bronco NV4500 / TR4050 to Dana 20 Transfer Case Adapter

This Dana 20 Transfer Case Adapter is the key to linking modern NV4500 or Tremec TR4050 5-speed performance with your Bronco’s classic drivetrain. Whether you're running a tried-and-true NV4500 or the newer TR-4050 transmission, this adapter kit allows seamless integration with your original Dana 20 transfer case—both T- and J-shift styles. Built for strength and longevity, the kit includes everything needed to make the connection: input shaft, bearing retainer, adapter housing, bearing, seal, gaskets, and all necessary hardware. Available in both 23-spline and 29-spline versions to match your specific transmission setup. If you're running a J-shift Dana 20, a twin stick shifter is required for proper operation.

• Engineered Compatibility: Adapts NV4500 or TR4050 5-speed transmissions to Dana 20 T-shift or J-shift transfer cases.

• Complete Kit: Includes input shaft, bearing retainer, adapter housing, bearing, seal, gaskets, and mounting hardware.

• Spline Options Available: Choose from 23-spline (for NV4500 and TR4050) or 29-spline (NV4500 only) to match your transmission output.

• Twin Stick Required for J-Shift: If using a J-shift Dana 20, a twin stick shifter must be installed for full function.

• Bolt-On Strength: Designed for high-torque applications with a fit that’s tight, secure, and built for trail duty.

Marry modern gearing with classic 4WD performance - this transmission adapter kit links your NV4500 or TR4050 5-speed to your Bronco Dana 20 without compromise.