Originally Posted by bossxr8
The diff ratio can be determined by finding the little metal tag on the diff centre that has the ratio stamped on it, or count how many times the tailshaft does a complete turn compared to the wheels. If the tailshaft turns 3 times to the wheels once then it is a 3:1 ratio. I think thats correct.
Yeah, for a LSD it is that easy. Better off going more turns to reduce the error. For example, mark the tailshaft and the wheel. Have someone watch the wheel. You turn the tailshaft until the wheel has spun 10 times. Then however many times the tailshaft spun, divide by ten. It is a lot easier to accurately count 27, 28 or 29 compared to 2.7, 2.8 and 2.9 (figures are for examples only).