Aftermarket Replacement Now Available – Manufactured by HollandThe original Wilson OEM gearbox has been discontinued. This direct-fit replacement is manufactured by Holland and installs using the same mounting points, delivering the same fit, function, and performance as the original unit. Enhance your Wilson hopper trailer with this Wilson style 2 Speed Gear Box, designed for optimal performance. This gear box is compatible with all Wilson Hopper models, ensuring a seamless fit. Note that a separate mounting bracket may be required. (mounting bracket sold separately). Enhances performance Compatible with all Wilson Hoppers (bracket may be required) Upgrade your hauling experience with this high-quality Wilson accessory. Take advantage of the convenience and efficiency provided by the Wilson Style 2 Speed Gear Box. Wilson Gearbox Bracket - Click Here Wilson Gearbox Bracket Mounting Hinge - Click Here Wilson Gearbox Double Latch - Click Here Wilson Gearbox Welded Lock Plate - Click here Replaces discontinued Wilson OEM 2-Speed Gearbox for hopper trailers.