It was kind of noisy at first (had a hum/whine) when you would apply throttle or when the lock up converter engaged one-to-one. It progressed from a little whine to all out rock grinding!
Dang....I really don't need this right now THIS close to our deadline, but at the same time I am happy it broke now instead of on the trip to Ohio in July. The guy that built the diff and customized it to fit the 69 camaro is going to make it right but I have to ground the car to get the old one out and over to him. With Monday as a holiday it might push beyond next week to get the new gear set in.
Isn't hot rodding fun?