Got a TH350 Turbo automatic transmission with a manual valve body? This GM original 22-tooth speedometer gear (part number 3987922, T22 in black) is exactly what you need to get your speedo reading right. It's not aftermarket – it's the real GM deal, new other condition (maybe open box or surplus). Important: it fits the small speedometer bullet housing that's about 1 inch across. It will NOT fit the larger 2-inch housing, so double-check yours before buying. Perfect for restorations, swaps, or fixing inaccurate speed readings after a gear change. Just pop it into the transmission tail housing and say goodbye to guessing your speed. Whether you're building a classic muscle car or tuning a street machine, this little gear makes a big difference. Don't risk a cheap knockoff – go with original GM for precision and reliability. Grab one and cruise with confidence, knowing your speedometer is spot on.
