The TUNTUN 5th Gear Lock Nut Retainer Kit is the essential solution for Dodge Ram owners who want to prevent transmission issues before they become costly repairs. If you've noticed symptoms like difficulty engaging 5th gear or unusual noises when shifting, this kit addresses the root cause: the lock nut vibrating loose over time and allowing the 5th-gear assembly to work its way off the splines.
For those who rely on their 1995-2005 Dodge Ram 2500 or 3500 4WD for work or heavy-duty towing, transmission failure isn't just inconvenient - it can be catastrophic. The NV4500 transmission is workhorse power, but that 5th gear lock nut issue has been a persistent problem for many owners. This kit directly replaces the problematic OEM component with a strengthened solution that includes precision-machined brass pucks, hardened set screws, and a robust lock nut designed to stay put even under the most demanding conditions.
Manufactured by a professional automotive parts factory with years of specialization in transmission components, this kit represents factory-direct quality without the dealership markup. Each component is constructed from high-strength steel with CNC precision and computer-programmed pulse welds, ensuring perfect fitment and long service life. The brass pucks provide just the right amount of compliance while maintaining positive engagement, creating a locking system that's both secure and durable.
Unlike major transmission repairs that can take hours and require specialized tools, this lock nut retainer kit installs quickly without requiring complete transmission disassembly. Many mechanics can perform this upgrade in under an hour using basic hand tools. The improved design prevents the common failure mode where the 5th gear nut backs off the splines, ensuring your truck stays on the road when you need it most. Whether you're hauling heavy loads, towing trailers, or simply want the reliability that comes from addressing known design flaws, this kit provides the confidence that comes from knowing your transmission is properly secured.
