Is your workhorse losing its strength? If you drive a Toyota Hilux , Fortuner , Innova , or Hiace , you know these vehicles are built for one thing: hard work. They carry heavy loads, travel long distances, and navigate rough terrain. But this heavy usage takes a toll, especially on the automatic transmission . When the gearbox starts slipping, making grinding noises, or fails to engage 4WD, many owners face a difficult choice: Buy a used ('half-cut') unit or go for a full overhaul? At Advance Auto Work , Johor Bahru's most reliable automotive specialist, we are here to tell you why an overhaul is the only safe choice for a 4x4. The Trap of the "Half-Cut" Gearbox for 4x4s For a regular sedan, a used gearbox might be okay. But for a 4x4 or commercial vehicle like a Hiace, it is a huge gamble. Think about it: Why was that "half-cut" gearbox in the scrapyard? It likely came from another truck that was also driven hard, used for towing, or carried heavy lo...