Hi, a professional inspection is definitely the best place to start. During a
gearbox rebuild, I’d have the gears, bearings, shafts, seals, and lubrication system checked carefully for wear or damage. Proper alignment and backlash should also be verified during reassembly. Choosing an experienced specialist who follows the manufacturer’s specifications and performs thorough testing after the rebuild can help ensure reliability. It’s also worth reviewing the gearbox’s operating conditions and maintenance schedule to prevent the same issues from returning.