Subscribe to a magazine

131 0201 Gear17 Z

Back to article View Gallery
18 of 27
17 Now you need to set backlash. This is the amount of slack or play between the ring and the pinion gears measured in thousandths of an inch. This is where a dial indicator comes in. Mount the magnetic base on the housing, then set the dial so that it engages a tooth on the ring. Lock the pinion in place (we wrapped a rag around the companion flange several times and held it tightly) and rock the ring gear back and forth to take a measurement. There is usually a small acceptable range (0.005-0.007 inch in this case) for backlash, but it's important to get it right for an accurate pattern.