Machter 5th Gear Lock Nut Retainer fits Dodge Ram 2500 3500 HD Cummins 4WD 4x4 New Venture UPDATED NV4500 Fits Dodge 1994 - 2005 Ram 2500 and 3500 with NV4500 transmissions.ONLY for DODGE 4wd models. Precision CNC Machined from high-strength steel for perfect fitment and extreme strength. Upgraded Lock Nut Retainer for DODGE 4wd models. Prevents the common issue of the nv4500 5th gear nut backing off of the shaft and causing failure. Can be installed easily in 1-2 hours. No need to disassemble the transmission assembly. No special tools required. Brand new nv4500 5th gear nut retainer with 3 Year Warranty & 30 Days Money Back Guarantee.