Driving it into driveline shop here. They said the u joints, carrier and rear end are fine and thats its the tranny.
We had it up. The noise is coming from inside the tranny.Sounds to me like rear end noise. Jack up both rear wheels or put on lift, disconnect drive shaft at rear end, spin rear wheels and listen. My thoughts are spider shaft broken, spider gear issues, or major ring and pinion gear issues. Bring it to another shop and avoid excessive driving because it will leave you on the side of the road. The shop you went to should not have let you drive it until they found the problem and give and estimate to fix it. Lets us know what happens.
They said its coming from inside the tranny. Got it at the tranny shop now. I put it on my Bendpak and heard the noise coming from inside the tranny as well.It's definitely something before the differential. It's making the noise too fast to be differential because it's happening more than twice per tire revolution.
Not since Ive had her. She's a completely stock and original funeral coach that was owned by funeral affecionados in the past. Ive had her since 2014. This noise just popped up out of no where. Same thing happened to a friends '74 Superior. Once they rebuilt it the problem was gone.The frequency of the noise in your video is roughly once every revolution of the drive shaft and 3 times every revolution of the rear wheels. Torque converter or flexplate would be roughly once every crank shaft revolution. With engine idling at 600 RPM, that would be 600 noises per minute or 10 noises per second and it would make noise standing still idling in park. Did somebody stand on the throttle in neutral and drop it into gear and tear something up??