If you can make a video of the noise it would help and send us a link. but, it sounds like the final drive gears in the transmission are no good. In this case you will need to replace the transmission.
This is a guide on a rear wheel drive car but it give you an idea of what it will take
Here are some diagrams to help you get the job done:
Please let us know what happens.
Images (Click to enlarge)
Saturday, August 19th, 2017 AT 12:52 PM