?About us: This TUNTUN 5th Gear Lock Nut Retainer Kit was manufacturer by a professional factory in China, which have been specialized in automobile parts for many year. All products have been exported to Global Market which was made of High Quality Material,ensuring a long service life. Factory direct, quality assurance, best price! ?OEM Part Number: 5013887AA ?Fits for: Fit for Dodge 1994 - 2005 for Ram 2500 and 3500 4WD with NV4500 transmissions (5.9L and 6.7L) Only fits 29-spline output shafts (for DODGE 4wd models) Does not work with for GM/for Cheverolet NV4500 transmissions. ?Package Including: 2x Set Screws 2x Brass Pucks 1x 5th Gear Nut 1x Spring Washer 1x 5th Gear Lock Nut Retainer ?Function: The lock nut will vibrate loose over time and allow the 5th-gear assembly to work its way off the splines of the shaft and no longer mesh with the companion gear. TUNTUN updated lock nut set retains factory main shaft lock nut fitment, prevents and repairs issues with 5th gear engagement. You never have to worry about the nut backing off again due to the splined lock. ?Features: Easy installation without removing, or disassembling the transmission assembly. Direct replacement and Perfect fit. Our TUNTUN updated lock nut set is a perfect replacement, made of high-strength steel and CNC constructed with computer programmed pulse welds, ensure a perfect fit with exact tolerances for high performance and long service life. ?Our : One year . All products have been 100 Percent tested before delivery and to offer true worry-free shopping experience. Wishing you a happy online shopping! :-)