Parts & Accessories Spare parts We offer a wide range of automatic transmissions for all models: 4-speed, 6-speed, 8-speed, and 10-speed for Tahoe, Yukon, and Sierra. We also provide maintenance services for transmissions, including sensor replacement, chips, and overhauls. Additionally, we have all types of transmissions available: American, Japanese, Chinese, and European. We offer both online and offline programming. In short, everything related to your automatic transmission is available under one roof. “World of Gears” is your first choice for gearbox maintenance at the best prices.